How to convert std string to LPCWSTR in C Unicode

Question

I m looking for a method  or a code snippet for converting std  string to LPCWSTR

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I prefer using standard converters   include  lt codecvt gt   std  string s    quot Hi quot   std  wstring convert lt std  codecvt utf8 utf16 lt wchar t gt  gt  converter  std  wstring wide   converter from bytes s   LPCWSTR result   wide c str     Please find more details in this answer  https   stackoverflow com a 18597384 592651  Update 12 21 2020   My answer was commented on by  Andreas H    I thought his comment is valuable  so I updated my answer accordingly    codecvt utf8 utf16 is deprecated in C  17  Also the code implies that source encoding is UTF-8 which it usually isn t  In C  20 there is a separate type std  u8string for UTF-8 because of that    But it worked for me because I am still using an old version of C   and it happened that my source encoding was UTF-8

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If you are in an ATL MFC environment  You can use the ATL conversion macro    include  lt atlbase h gt   include  lt atlconv h gt          string myStr  My string    CA2W unicodeStr myStr     You can then use unicodeStr as an LPCWSTR   The memory for the unicode string is created on the stack and released then the destructor for unicodeStr executes

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Thanks for the link to the MSDN article  This is exactly what I was looking for   std  wstring s2ws const std  string amp  s        int len      int slength    int s length     1      len   MultiByteToWideChar CP ACP  0  s c str    slength  0  0        wchar t  buf   new wchar t len       MultiByteToWideChar CP ACP  0  s c str    slength  buf  len       std  wstring r buf       delete   buf      return r     std  wstring stemp   s2ws myString   LPCWSTR result   stemp c str

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Instead of using a std  string  you could use a std  wstring   EDIT   Sorry this is not more explanatory  but I have to run   Use std  wstring  c str

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string  myMessage  helloworld   int len  int slength    int myMessage length     1  len   MultiByteToWideChar CP ACP  0  myMessage c str    slength  0  0    wchar t  buf   new wchar t len   MultiByteToWideChar CP ACP  0  myMessage c str    slength  buf  len   std  wstring r buf    std  wstring stemp   r C str    LPCWSTR result   stemp c str

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The solution is actually a lot easier than any of the other suggestions  std  wstring stemp   std  wstring s begin    s end     LPCWSTR sw   stemp c str     Best of all  it s platform independent

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LPCWSTR lpcwName std  wstring strname begin    strname end    c str

[c++] How to convert std::string to LPCWSTR in C++ (Unicode)

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