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CWindowImpl::WindowProc

Visual Studio 2012

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

Reference

CWindowImpl Class

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