WM_CLOSE

This message occurs when a window is closed.

Parameter

Description

wParam	Is not used.
lParam	Is not used.

Default Action

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

Comments

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.