This message informs a window that its nonclient area is being destroyed. The DestroyWindow function sends the WM_NCDESTROY message to the window following the WM_DESTROY message. This message is used to free the allocated memory block associated with the window.
| Parameter | Description |
| wParam | Is not used. | |
| lParam | Is not used. |
This message frees any memory internally allocated for the window.