How do I get the title of the current active window using c

Question

I d like to know how to grab the Window title of the current active window  i e  the one that has focus  using C

User · Answer

Use the Windows API  Call GetForegroundWindow     GetForegroundWindow   will give you a handle  named hWnd  to the active window   Documentation  GetForegroundWindow function   Microsoft Docs

User · Answer

Loop over Application Current Windows   and find the one with IsActive    true

User · Answer

See example on how you can do this with full source code here   http   www csharphelp com 2006 08 get-current-window-handle-and-caption-with-windows-api-in-c    DllImport  user32 dll    static extern IntPtr GetForegroundWindow      DllImport  user32 dll    static extern int GetWindowText IntPtr hWnd  StringBuilder text  int count    private string GetActiveWindowTitle         const int nChars   256      StringBuilder Buff   new StringBuilder nChars       IntPtr handle   GetForegroundWindow         if  GetWindowText handle  Buff  nChars   gt  0                return Buff ToString              return null        Edited with  Doug McClean comments for better correctness

User · Answer

you can use process class it s very easy  use this namespace   using System Diagnostics    if you want to make a button to get active window   private void button1 Click object sender  EventArgs e                           Process currentp   Process GetCurrentProcess           TextBox1 Text   currentp MainWindowTitle     this textbox will be filled with active window

User · Answer

Based on GetForegroundWindow function   Microsoft Docs    DllImport  user32 dll   CharSet   CharSet Auto  SetLastError   true   static extern IntPtr GetForegroundWindow      DllImport  user32 dll   CharSet   CharSet Auto  SetLastError   true   static extern int GetWindowText IntPtr hWnd  StringBuilder text  int count     DllImport  user32 dll   CharSet   CharSet Auto  SetLastError   true   static extern int GetWindowTextLength IntPtr hWnd    private string GetCaptionOfActiveWindow         var strTitle   string Empty      var handle   GetForegroundWindow           Obtain the length of the text        var intLength   GetWindowTextLength handle    1      var stringBuilder   new StringBuilder intLength       if  GetWindowText handle  stringBuilder  intLength   gt  0                strTitle   stringBuilder ToString              return strTitle      It supports UTF8 characters

User · Answer

If you were talking about WPF then use    Application Current Windows OfType lt Window gt    SingleOrDefault w   gt  w IsActive

User · Answer

If it happens that you need the Current Active Form from your MDI application   MDI- Multi Document Interface    Form activForm  activForm   Form ActiveForm ActiveMdiChild

[c#] How do I get the title of the current active window using c#?

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