Screen Saver Function Call

[SMcNeill]

The GetDesktopWindow works flawlessly for me in Win11.

Code: (Select All)

' declare external libraries.
Declare Dynamic Library "user32"
    Function SendMessageA%& (ByVal hWnd%&, Byval Msg~&, Byval wParam~%&, Byval lParam%&)
    Function GetDesktopWindow%& ()
End Declare

' declare screen saver call constants
Const wm_syscommand = &H112&
Const sc_screensave = &HF140&
Sleep 2

Print GetDesktopWindow
Print &HFFFF&
Sleep

s%& = SendMessageA(GetDesktopWindow, wm_syscommand, sc_screensave, 0&)

As you can see from the tiny little screenshot above, the value I get from GetDesktopWindow isn't the same as the &HFFFF which you were using.  That could be the whole issue in a nutshell.