The WM_CPL_LAUNCHED message is sent when a Control Panel
application, started by the WM_CPL_LAUNCH message, has ended.
The WM_CPL_LAUNCHED message is sent to the window identified by the wParam parameter of the WM_CPL_LAUNCH message that started the
application.
wParam
Specifies whether the application was started. If the application was started, this parameter is nonzero. Otherwise, it is zero.
lParam
Not used.
The value returned by the application is ignored for this message.