WindowProc info Overview Group

The WindowProc function is an application-defined callback function that processes messages sent to a window.

LRESULT CALLBACK WindowProc(

HWND hwnd,

// handle of window

UINT uMsg,

// message identifier

WPARAM wParam,

// first message parameter

LPARAM lParam

// second message parameter

);

Parameters

hwnd: Identifies the window.
uMsg: Specifies the message.
wParam: Specifies additional message information. The contents of this parameter depend on the value of the uMsg parameter.
lParam: Specifies additional message information. The contents of this parameter depend on the value of the uMsg parameter.

Return Values

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

Remarks

WindowProc is a placeholder for the application-defined function name.

HWND hwnd,	// handle of window
UINT uMsg,	// message identifier
WPARAM wParam,	// first message parameter
LPARAM lParam	// second message parameter
);

WindowProc info Overview Group

Parameters

Return Values

Remarks

See Also