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 WM_SETFOCUS

The WM_SETFOCUS message is sent to a window after it has gained the keyboard focus.

A window receives this message through its WindowProc function.

    LRESULT CALLBACK WindowProc(
      HWND hwnd,       // handle to window
      UINT uMsg,       // WM_SETFOCUS
      WPARAM wParam,   // handle to window (HWND)
      LPARAM lParam    // not used
    );

Parameters

• wParam
  Handle to the window that has lost the keyboard focus. This parameter can be NULL.
• lParam
  This parameter is not used.

Return Values

An application should return zero if it processes this message.

Remarks

To display a caret, an application should call the appropriate caret functions when it receives the WM_SETFOCUS message.

Requirements

• Windows NT/2000 or later: Requires Windows NT 3.1 or later.
• Windows 95/98/Me: Requires Windows 95 or later.
• Header: Declared in Winuser.h; include Windows.h.

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Notebook exported on Monday, 7 July 2008, 18:56:50 PM Eastern Daylight Time