DefWindowProc

The DefWindowProc function calls the default window procedure to provide default processing for any window messages that an application does not process. This function ensures that every message is processed. DefWindowProc is called with the same parameters received by the window procedure.

LRESULT DefWindowProc(

HWND hWnd, // handle to window
UINT Msg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);  

Parameters

hWnd

Identifies the window procedure that received the message.

Msg

Specifies the message.

wParam

Specifies additional message information. The content of this parameter depends on the value of the Msg parameter.

lParam

Specifies additional message information. The content of this parameter depends on the value of the Msg parameter.

Return Values

The return value is the result of the message processing and depends on the message.

See Also

CallWindowProc, DefDlgProc, WindowProc