Error LNK2019 Unresolved External Symbol in Visual Studio

Question

I ve downloaded this C   code from the SBIG website in order to control  take pictures and save them  the camera  model ST-401ME  which I purchased from them  I have a Matlab program which needs to call this so I m trying to compile  with Visual Studio  this code with its headers and libraries into an executable  However  when I try I get the above mentioned error  Just to note I have added the files which contain the libraries to the directory path   The exact wording of the output is this   1 gt ------ Build started  Project  CaptureImage  Configuration  Debug Win32 ------ 1 gt Compiling    1 gt main cpp 1 gt Linking    1 gt csbigcam obj   error LNK2019  unresolved external symbol  SBIGUnivDrvCommand 12 referenced in function  public  enum PAR ERROR   thiscall CSBIGCam  SBIGUnivDrvCommand short void   void       SBIGUnivDrvCommand CSBIGCam  QAE AW4PAR ERROR  FPAX0 Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffclos referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  SaveFITS char const       SaveFITS CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffprec referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  SaveFITS char const       SaveFITS CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffpky referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  SaveFITS char const       SaveFITS CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffuky referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  SaveFITS char const       SaveFITS CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffppr referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  SaveFITS char const       SaveFITS CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffcrim referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  SaveFITS char const       SaveFITS CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffinit referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  SaveFITS char const       SaveFITS CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffphis referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  History2FITS struct fitsfile       History2FITS CSBIGImg  QAE AW4SBIG FILE ERROR  PAUfitsfile   Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffmrhd referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffgrec referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffghsp referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffghdn referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffgkyj referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffgkyd referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffgkys referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffgpxv referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffgipr referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt csbigimg obj   error LNK2019  unresolved external symbol  ffopen referenced in function  public  enum SBIG FILE ERROR   thiscall CSBIGImg  ReadFITSImage char const       ReadFITSImage CSBIGImg  QAE AW4SBIG FILE ERROR  PBD Z  1 gt I  My Documents Visual Studio 2008 Projects CaptureImage Debug CaptureImage exe   fatal error LNK1120  19 unresolved externals 1 gt Build log was saved at  file   i  My Documents Visual Studio 2008 Projects CaptureImage CaptureImage Debug BuildLog htm  1 gt CaptureImage - 20 error s   0 warning s             Build  0 succeeded  1 failed  0 up-to-date  0 skipped              I think this has to do with linking the libraries  I never learned how to do that in Visual Studio  and It doesn t help that the class I took in college was 5 years ago so I barely remember anything   Because of the length of the code I ll only poast the parts where the errors occur  If you want more of it  like the main  just let me know   Code   csbigcam cpp   include  lpardrv h   include  sbigudrv h   include  csbigcam h   include  csbigimg h   include  lt string gt   include  lt math h gt   using namespace std    ifndef INVALID HANDLE VALUE  define INVALID HANDLE VALUE -1  endif   define VERSION STR      1 2       version of this class          Temperature Conversion Constants  Defined in the SBIG Universal Driver Documentation      define T0      25 0  define R0       3 0  define DT CCD  25 0  define DT AMB  45 0  define RR CCD   2 57  define RR AMB   7 791  define RB CCD  10 0  define RB AMB   3 0  define MAX AD  4096         PAR ERROR CSBIGCam  GetFullFrame int  amp nWidth  int  amp nHeight        GetCCDInfoResults0 gcir      GetCCDInfoParams gcip      unsigned short vertNBinning      unsigned short rm          Get the image dimensions     vertNBinning   m uReadoutMode  gt  gt  8      if   vertNBinning    0           vertNBinning   1      rm   m uReadoutMode  amp  0xFF      gcip request    m eActiveCCD    CCD IMAGING   CCD INFO IMAGING   CCD INFO TRACKING       if   SBIGUnivDrvCommand CC GET CCD INFO   amp gcip   amp gcir     CE NO ERROR           return m eLastError      if   rm  gt   gcir readoutModes           return CE BAD PARAMETER      nWidth   gcir readoutInfo rm  width      if   rm  gt  3  amp  amp  rm  lt   5           nHeight   gcir readoutInfo rm-3  height   vertNBinning      else         nHeight   gcir readoutInfo rm  height   vertNBinning      return CE NO ERROR             csbigcam h   ifndef  CSBIGCAM   define  CSBIGCAM    ifndef  PARDRV    include  sbigudrv h   endif   ifndef  CSBIGIMG    include  csbigimg h   endif   include  lt string gt  using namespace std   typedef enum  RELAY XPLUS  RELAY XMINUS  RELAY YPLUS  RELAY YMINUS   CAMERA RELAY  typedef enum  SBDF LIGHT ONLY  SBDF DARK ONLY  SBDF DARK ALSO   SBIG DARK FRAME  typedef enum  GS IDLE  GS DAWN  GS EXPOSING DARK  GS DIGITIZING DARK  GS EXPOSING LIGHT      GS DIGITIZING LIGHT  GS DUSK   GRAB STATE   class CSBIGCam   private      PAR ERROR m eLastError      PAR COMMAND m eLastCommand      short m nDrvHandle      CAMERA TYPE m eCameraType      CCD REQUEST m eActiveCCD      double m dExposureTime      unsigned short m uReadoutMode      ABG STATE7 m eABGState      int m nSubFrameLeft  m nSubFrameTop  m nSubFrameWidth  m nSubFrameHeight      GRAB STATE m eGrabState      double m dGrabPercent      CFW MODEL SELECT m eCFWModel      CFW ERROR m eCFWError      struct           unsigned short vertNBinning  hBin  vBin          unsigned short rm          int left  top  width  height        m sGrabInfo   public         Constructors Destructors     CSBIGCam        CSBIGCam OpenDeviceParams odp       CSBIGCam SBIG DEVICE TYPE dev        CSBIGCam        void Init            Error Reporting Routines     PAR ERROR GetError        string GetErrorString        string GetErrorString PAR ERROR err       PAR COMMAND GetCommand            Accessor Functions     double GetExposureTime void    return m dExposureTime        void SetExposureTime double exp    m dExposureTime   exp        CCD REQUEST GetActiveCCD void    return m eActiveCCD        void SetActiveCCD CCD REQUEST ccd    m eActiveCCD   ccd        unsigned short GetReadoutMode void    return m uReadoutMode        void SetReadoutMode unsigned short rm    m uReadoutMode   rm        CAMERA TYPE GetCameraType void    return m eCameraType        ABG STATE7 GetABGState void    return m eABGState        void SetABGState ABG STATE7 abgState    m eABGState   abgState        void SetSubFrame int nLeft  int nTop  int nWidth  int nHeight       void GetSubFrame int  amp nLeft  int  amp nTop  int  amp nWidth  int  amp nHeight       PAR ERROR GetReadoutInfo double  amp pixelWidth  double  amp pixelHeight  double  amp eGain           Driver Device Routines     PAR ERROR OpenDriver        PAR ERROR CloseDriver        PAR ERROR OpenDevice OpenDeviceParams odp       PAR ERROR CloseDevice        PAR ERROR GetDriverInfo DRIVER REQUEST request  GetDriverInfoResults0  amp gdir           High-Level Exposure Related Commands     PAR ERROR GrabSetup CSBIGImg  pImg  SBIG DARK FRAME dark       PAR ERROR GrabMain CSBIGImg  pImg  SBIG DARK FRAME dark       PAR ERROR GrabImage CSBIGImg  pImg  SBIG DARK FRAME dark       void GetGrabState GRAB STATE  amp grabState  double  amp percentComplete           Low-Level Exposure Related Commands     PAR ERROR StartExposure SHUTTER COMMAND shutterState       PAR ERROR EndExposure void       PAR ERROR IsExposureComplete MY LOGICAL  amp complete       PAR ERROR StartReadout StartReadoutParams srp       PAR ERROR EndReadout void       PAR ERROR ReadoutLine ReadoutLineParams rlp  MY LOGICAL darkSubtract  unsigned short  dest       PAR ERROR DumpLines unsigned short noLines          Temperature Related Commands     PAR ERROR GetCCDTemperature double  amp ccdTemp       PAR ERROR SetTemperatureRegulation MY LOGICAL enable  double setpoint       PAR ERROR QueryTemperatureStatus MY LOGICAL  amp enabled  double  amp ccdTemp          double  amp setpointTemp  double  amp percentTE           Control Related Commands     PAR ERROR ActivateRelay CAMERA RELAY relay  double time       PAR ERROR IsRelayActive CAMERA RELAY relay  MY LOGICAL  amp active       PAR ERROR AOTipTilt AOTipTiltParams attp       PAR ERROR CFWCommand CFWParams cfwp  CFWResults  amp cfwr           General Purpose Commands     PAR ERROR EstablishLink void       string GetCameraTypeString void       PAR ERROR GetFullFrame int  amp nWidth  int  amp nHeight       PAR ERROR GetFormattedCameraInfo string  amp ciStr  MY LOGICAL htmlFormat   TRUE           Utility functions     MY LOGICAL CheckLink void       unsigned short DegreesCToAD double degC  MY LOGICAL ccd   TRUE       double ADToDegreesC unsigned short ad  MY LOGICAL ccd   TRUE          CFW Functions     CFW MODEL SELECT GetCFWModel void    return m eCFWModel        PAR ERROR SetCFWModel CFW MODEL SELECT cfwModel  CFW COM PORT comPort   CFWPORT COM1       PAR ERROR SetCFWPosition CFW POSITION position       PAR ERROR GetCFWPositionAndStatus CFW POSITION  amp position  CFW STATUS  amp status       PAR ERROR GetCFWMaxPosition CFW POSITION  amp position       CFW ERROR GetCFWError void    return m eCFWError        string GetCFWErrorString CFW ERROR err       string GetCFWErrorString void           Allows access directly to driver     PAR ERROR SBIGUnivDrvCommand short command  void  Params  void  Results        endif     ifndef  CSBIGCAM       csbigimg ccp   include  lpardrv h   include  csbigimg h   include  lt stdio h gt   include  lt string h gt   include  lt string gt       Local Constants     if TARGET    ENV MACOSX      define LONGLONG long long  endif  define FILE VERSION    3          current header version written     define DATA VERSION    1          current data version written     define HEADER LEN      2048  define VERSION STR      1 2       version of this class    static const char    HEADER KEYWORDS            File version           Data version           Exposure           Focal length           Aperture           Response factor           Note           Background           Range           Height           Width           Date           Time           Exposure state           Temperature           Number exposures           Each exposure           History           Observer           X pixel size           Y pixel size           Pedestal           E gain           User 1           User 2           User 3           User 4           Filter           Readout mode           Track time           Sat level           End     typedef enum       HH FILE VERSION      HH DATA VERSION      HH EXPOSURE      HH FOCAL LENGTH      HH APERTURE      HH RESPONSE FACTOR      HH NOTE      HH BACKGROUND      HH RANGE      HH HEIGHT      HH WIDTH      HH DATE      HH TIME      HH EXPOSURE STATE      HH TEMPERATURE      HH NUMBER EXPOSURES      HH EACH EXPOSURE      HH HISTORY      HH OBSERVER      HH X PIXEL SIZE      HH Y PIXEL SIZE      HH PEDESTAL      HH E GAIN      HH USER 1      HH USER 2      HH USER 3      HH USER 4      HH FILTER      HH READOUT MODE      HH TRACK TIME      HH SAT LEVEL      HH END   SBIG HEADER HEADING           if INCLUDE FITSIO                save file in FITS format                res   SaveFITS pFullPath    else         SBIG FILE ERROR CSBIGImg  History2FITS fitsfile  fptr        int         status   0      const char   msg   p      char        c   cp    char  m cHistory c str        int         index      MY LOGICAL  first   TRUE       while   cp            c    cp            if    p strchr HISTORY CHARS  c      NULL                 index    p - HISTORY CHARS  sizeof const char               msg   HISTORY PHRASES index             else if   c     0                continue          else             msg                   if   first               fits write key fptr  TSTRING   SWMODIFY    void   m cSoftware c str         amp status           first   FALSE           if  fits write history fptr msg  amp status                 return SBFE FITS HEADER ERROR                      return SBFE NO ERROR            SBIG FILE ERROR CSBIGImg  ReadFITSImage char const  pFullPath    SBIG FILE ERROR err   SBFE FORMAT ERROR  fitsfile  fptr             FITS file pointer  defined in fitsio h    char card FLEN CARD        Standard string lengths defined in fitsio h    int status   0             CFITSIO status value MUST be initialized to zero     int hdupos  nkeys  ii  jj  int bitpix  naxis  long naxes 2     1 1   fpixel 2     1 1   unsigned short  uip  long l  l2  double d  char s 80   MY LOGICAL first   TRUE  struct tm obs   if   fits open file  amp fptr  pFullPath  READONLY   amp status         do             Allow to break out            get and check the dimensions         if   fits get img param fptr  2   amp bitpix   amp naxis  naxes   amp status    break          if   bitpix    16    naxis    2   break              allocate the buffer         err   SBFE MEMORY ERROR          if    AllocateImageBuffer naxes 1   naxes 0     break          uip   GetImagePointer                read the image data         err   SBFE READ ERROR          if   fits read pix fptr  TUSHORT  fpixel  naxes 0  naxes 1   NULL  uip  NULL   amp status    break              try and read the SBIG keys         status   0  if    fits read key str fptr  FITS KEYS FK OBJ   s  NULL   amp status       SetFITSObject s           status   0  if    fits read key str fptr  FITS KEYS FK SCOPE   s  NULL   amp status     SetFITSTelescope s           status   0  if    fits read key str fptr  FITS KEYS FK INST   s  NULL   amp status      SetCameraModel s           status   0  if    fits read key str fptr  FITS KEYS FK OBS   s  NULL   amp status       SetObserver s           status   0  if    fits read key str fptr  FITS KEYS FK DATEOBS   s  NULL   amp status                              if   sscanf s   4d- 2d- 2dT 2d  2d  2d    amp obs tm year   amp obs tm mon   amp obs tm mday                                       amp obs tm hour   amp obs tm min   amp obs tm sec     6                                 obs tm year -  1900  obs tm mon -  1                              memcpy  amp m sDecodedImageStartTime   amp obs  sizeof struct tm                                                            status   0  if    fits read key dbl fptr  FITS KEYS FK EXP    amp d  NULL   amp status      SetExposureTime d           status   0  if    fits read key dbl fptr  FITS KEYS FK CCDT    amp d  NULL   amp status     SetCCDTemperature d           status   0  if    fits read key dbl fptr  FITS KEYS FK PIXX    amp d  NULL   amp status     SetPixelWidth d 1000 0           status   0  if    fits read key dbl fptr  FITS KEYS FK PIXY    amp d  NULL   amp status     SetPixelHeight d 1000 0           status   0  if    fits read key lng fptr  FITS KEYS FK BINX    amp l  NULL   amp status   amp  amp                            fits read key lng fptr  FITS KEYS FK BINY    amp l2  NULL   amp status    SetBinning  unsigned short l   unsigned short l2           status   0  if    fits read key lng fptr  FITS KEYS FK ORGX    amp l  NULL   amp status   amp  amp                            fits read key lng fptr  FITS KEYS FK ORGY    amp l2  NULL   amp status    SetSubFrame  unsigned short l   unsigned short l2           status   0  if    fits read key dbl fptr  FITS KEYS FK EGAIN    amp d  NULL   amp status        SetEGain d           status   0  if    fits read key dbl fptr  FITS KEYS FK FL    amp d  NULL   amp status       SetFocalLength d 25 4           status   0  if    fits read key dbl fptr  FITS KEYS FK APTD    amp d  NULL   amp status     SetApertureDiameter d 25 4           status   0  if    fits read key dbl fptr  FITS KEYS FK APTA    amp d  NULL   amp status     SetApertureArea d 25 4 25 4           status   0  if    fits read key lng fptr  FITS KEYS FK BLACK    amp l  NULL   amp status    SetBackground l           status   0  if    fits read key lng fptr  FITS KEYS FK WHITE    amp l  NULL   amp status    SetRange l - GetBackground             status   0  if    fits read key lng fptr  FITS KEYS FK PED    amp l  NULL   amp status      SetPedestal  unsigned short  l 100            status   0  if    fits read key lng fptr  FITS KEYS FK MAX    amp l  NULL   amp status      SetSaturationLevel  unsigned short l           status   0  if    fits read key str fptr  FITS KEYS FK SWA    s  NULL   amp status      SetSoftware s           status   0  if    fits read key str fptr  FITS KEYS FK FILT    s  NULL   amp status     SetFilter s           status   0  if    fits read key lng fptr  FITS KEYS FK SNAP    amp l  NULL   amp status     SetNumberExposures  unsigned short l                                                                                               SetEachExposure GetExposureTime   l           status   0  if    fits read key lng fptr  FITS KEYS FK RES    amp l  NULL   amp status      SetReadoutMode  unsigned short l           status   0  if    fits read key str fptr  FITS KEYS FK EXPST    s  NULL   amp status   amp  amp  sscanf s   lX    amp l     1   SetExposureState  unsigned short l           status   0  if    fits read key dbl fptr  FITS KEYS FK RESP    amp d  NULL   amp status     SetResponseFactor d           status   0  if    fits read key str fptr  FITS KEYS FK NOTE    s  NULL   amp status         SetImageNote s           status   0  if    fits read key dbl fptr  FITS KEYS FK TRAK    amp d  NULL   amp status     SetTrackExposure d           status   0              read and filter out the parsed keywords         fits get hdu num fptr   amp hdupos       Get the current HDU position            for     status  hdupos        Main loop through each extension                          fits get hdrspace fptr   amp nkeys  NULL   amp status      get   of keywords                for  ii   1  ii  lt   nkeys  ii         Read and print each keywords                    if  fits read record fptr  ii  card   amp status   break                  for  jj 0  jj lt FK NEXT  jj                          l   strlen FITS KEYS jj                        if   strncmp card  FITS KEYS jj   l     0   break                                    if   jj    FK NEXT                         if    first   m cAdditionalFITSKeys      r                       m cAdditionalFITSKeys    card                       first   FALSE                                              fits movrel hdu fptr  1  NULL   amp status       try to move to next HDU                      if  status    END OF FILE   status   0     Reset after normal error            if   status   break                          got here so there was no error         err   SBFE NO ERROR          m nDefaultImageFormat   SBIF FITS        while   FALSE        fits close file fptr   amp status      if  err    SBFE NO ERROR  amp  amp  status      err   SBFE FORMAT ERROR  if   err    SBFE NO ERROR       DeleteImageData    return err      endif   csbigimg h   ifndef  CSBIGIMG       define  CSBIGIMG       Compile Time Options         define INCLUDE FITSIO  1          set to 1 to compile and link with FITSIO Library          ifndef  LPARDRV           include  lpardrv h       endif      include  lt time h gt       include  lt string gt   using namespace std        if INCLUDE FITSIO          include  fitsio h       endif     INCLUDE FITSIO      ifndef PI      define PI  3 1415926535  endif      Exposure State Field Defines         define ES ABG MASK             0x0003      define ES ABG UNKNOWN          0x0000      define ES ABG LOW              0x0001      define ES ABG CLOCKED          0x0002      define ES ABG MID              0x0003       define ES ABG RATE MASK        0x00C0      define ES ABG RATE FIXED       0x0000      define ES ABG RATE LOW         0x0040      define ES ABG RATE MED         0x0080      define ES ABG RATE HI          0x00C0       define ES DCS MASK             0x000c      define ES DCS UNKNOWN          0x0000      define ES DCS ENABLED          0x0004      define ES DCS DISABLED         0x0008       define ES DCR MASK             0x0030      define ES DCR UNKNOWN          0x0000      define ES DCR ENABLED          0x0010      define ES DCR DISABLED         0x0020       define ES AUTOBIAS MASK        0x0100      define ES AUTOBIAS ENABLED     0x0100      define ES AUTOBIAS DISABLED    0x0000  typedef enum   SBIF COMPRESSED                 SBIF UNCOMPRESSED                 SBIF FITS                 SBIF DEFAULT   SBIG IMAGE FORMAT  typedef enum       SBFE NO ERROR      SBFE OPEN ERROR      SBRE CLOSE ERROR      SBFE READ ERROR      SBFE WRITE ERROR      SBFE FORMAT ERROR      SBFE MEMORY ERROR      SBFE FITS HEADER ERROR      SBFE WRONG SIZE      SBFE NEXT ERROR   SBIG FILE ERROR   class CSBIGImg         private      int                 m nHeight  m nWidth                image size in pixels     int                 m nSubFrameTop  m nSubFrameLeft    for partial frames the top-left pixel     unsigned short       m pImage                          pointer to image data     double              m dCCDTemperature                  CCD Temp at start of exposure     double              m dExposureTime                    Exposure time in seconds     double              m dTrackExposure                   Exposure when tracking     double              m dEachExposure                    Snapshot time in seconds     double              m dFocalLength                     Lens Telescope Focal Length in inches     double              m dApertureArea                    Lens Telescope Aperture Are in Sq-Inches     double              m dResponseFactor                  Magnitude Calibration Factor     double              m dPixelHeight  m dPixelWidth      Pixel Dimensions in mm     double              m dEGain                           Electronic Gain  e- ADU     long                m lBackground  m lRange            Display Background and Range     unsigned short      m uNumberExposures                 Number of exposures co-added     unsigned short      m uSaturationLevel                 Pixels at this level are saturated     unsigned short      m uPedestal                        Image Pedestal     unsigned short      m uExposureState                   Exposure State     unsigned short      m uReadoutMode                     Camera Readout Mode use to acquire image     unsigned short      m uHorizontalBinning               Binning used in X     unsigned short      m uVerticalBinning                 Binning used in Y     string              m cImageNote                       Note attached to image     string              m cObserver                        Observer name     string              m cHistory                         Image History string of modification chars     string              m cFilter                          Filter name imaged through     string              m cSoftware                        Software App Name and Version     string              m cCameraModel                     Model of camera used to acquire image     int                 m isCompressed                     clc     MY LOGICAL          m bImageModified                   True when modified and not saved     SBIG IMAGE FORMAT   m nDefaultImageFormat              default image format for Saves     struct tm           m sDecodedImageStartTime           Decoded time light exposure started     MY LOGICAL          m bImageCanClose                   TRUE when image can be closed  FALSE if owned by                                                             a CSBIGCam object and acquiring data        public         Constructors Destructor        CSBIGImg void       CSBIGImg int height  int width                       CSBIGImg void        void            Init void       void            DeleteImageData void                More Accessor Functions        void            SetImageStartTime void       void            SetImageStartTime time t startTime       void            SetImageStartTime int mon  int dd  int yy  int hr  int min  int sec       void            SetImageStartTime struct tm  pStartTime       void            SetSubFrame int nLeft  int nTop       void            GetSubFrame int  amp nLeft  int  amp nTop       void            SetBinning unsigned short nHoriz  unsigned short nVert       void            GetBinning unsigned short  amp nHoriz  unsigned short  amp nVert       void            AddHistory string str           File IO Routines        SBIG FILE ERROR SaveImage const char  pFullPath  SBIG IMAGE FORMAT fmt   SBIF DEFAULT       SBIG FILE ERROR OpenImage const char  pFullPath           Utility Functions        MY LOGICAL      AllocateImageBuffer int height  int width       void            CreateSBIGHeader char  pHeader  MY LOGICAL isCompressed       MY LOGICAL      ParseHeader char  pHeader  MY LOGICAL  amp isCompressed       SBIG FILE ERROR SaveCompressedImage const char  pFullPath  char  pHeader       SBIG FILE ERROR ReadCompressedImage FILE  fh       SBIG FILE ERROR SaveUncompressedImage const char  pFullPath  char  pHeader       SBIG FILE ERROR ReadUncompressedImage FILE  fh           int             CompressSBIGData unsigned char  pCmpData  int imgRow       void            IntelCopyBytes unsigned char  pRevData  int imgRow       void            AutoBackgroundAndRange void       string          GetFileErrorString SBIG FILE ERROR err       unsigned short  GetAveragePixelValue void       unsigned short  GetAveragePixelValue int left  int top  int width  int height       void            GetFormattedImageInfo string  amp iiStr  MY LOGICAL htmlFormat   TRUE           Image Processing Funcions        void            VerticalFlip void       void            HorizontalFlip void       SBIG FILE ERROR DarkSubtract CSBIGImg  pImg       SBIG FILE ERROR FlatField CSBIGImg  pImg           Color Image Processing        void            RemoveBayerColor void     if INCLUDE FITSIO private      string          m cFITSObject                          Name of object in FITS header     string          m cFITSTelescope                       Name of telescope in FITS header     double          m dApertureDiameter         Diameter of telescope     string          m cAdditionalFITSKeys                  additional FITS keywords  public         FITS Accessor functions        void        SetFITSObject string str          m cFITSObject   str        string      GetFITSObject void                return m cFITSObject       void        SetFITSTelescope string str       m cFITSTelescope   str        string      GetFITSTelescope void             return m cFITSTelescope       void        SetApertureDiameter double ap     m dApertureDiameter   ap        double      GetApertureDiameter void          return m dApertureDiameter        void        SetAdditionalFITSKeys string str    m cAdditionalFITSKeys   str        string      GetAdditionalFITSKeys void        return m cAdditionalFITSKeys            FITS file format utilities        SBIG FILE ERROR SaveFITS const char  pFullPath       SBIG FILE ERROR History2FITS fitsfile  fptr       SBIG FILE ERROR ReadFITSImage const char  pFullPath    endif      endif     ifndef  CSBIGIMG

User · Answer

When you have everything  included  an unresolved external symbol is often a missing   or  amp  in the declaration or definition of a function

User · Answer

I was getting this error after adding the include files and linking the library  It was because the lib was built with non-unicode and my application was unicode  Matching them fixed it

[c++] Error LNK2019: Unresolved External Symbol in Visual Studio

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