Applies to: desktop apps only

Sent as a signal that a window or an application should terminate.

A window receives this message through its WindowProc function.

#define WM_CLOSE                        0x0010

Parameters

wParam

This parameter is not used.

lParam

This parameter is not used.

Return value

Type: LRESULT

If an application processes this message, it should return zero.

Remarks

An application can prompt the user for confirmation, prior to destroying a window, by processing the WM_CLOSE message and calling the DestroyWindow function only if the user confirms the choice.

By default, the DefWindowProc function calls the DestroyWindow function to destroy the window.

Requirements

See also

Reference

DefWindowProc

DestroyWindow

Conceptual

Windows

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Build date: 5/5/2012