CWindowImpl::WindowProc

  • Article

This static function implements the window procedure.

static LRESULT CALLBACK WindowProc( 
   HWND hWnd, 
   UINT uMsg, 
   WPARAM wParam, 
   LPARAM lParam  
);

Parameters

  • hWnd
    [in] The handle to the window.

  • uMsg
    [in] The message sent to the window.

  • wParam
    [in] Additional message-specific information.

  • lParam
    [in] Additional message-specific information.

Return Value

The result of the message processing.

Remarks

WindowProc uses the default message map (declared with BEGIN_MSG_MAP) to direct messages to the appropriate handlers. If necessary, WindowProc calls DefWindowProc for additional message processing. If the final message is not handled, WindowProc does the following:

  • Performs unsubclassing if the window was unsubclassed.

  • Clears m_hWnd.

  • Calls OnFinalMessage before the window is destroyed.

You can override WindowProc to provide a different mechanism for handling messages.

Requirements

Header: atlwin.h

See Also

Reference

CWindowImpl Class