WM_CLOSE

This message occurs when a window is closed.

Parameters

wParam

This parameter is not used.

lParam

This parameter is not used.

Comments

The DefWindowProc function calls the DestroyWindow function to destroy the window.

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.

See Also

DestroyWindow