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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.

See Also

CallWindowProc, DefWindowProc, RegisterClass 

file: /Techref/os/win/api/win32/func/src/f91_13.htm, 2KB, , updated: 2000/4/7 11:19, local time: 2024/11/23 16:51,
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