CWindowImpl::WindowProc

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

Other Resources

CWindowImpl Members