Stopped working with Win 11 Upgrade

[gpb]

From gPhotoShow point of view there is no difference when running from the Preview button or running as screen saver, the code is the same and it does the same things.
There are however differences in the environment, when a program is started as a screen saver it runs in its own desktop separate from the other running programs. There may be other minor differences but I am not aware of them.
Unfortunately I cannot know why VLC in one case works without problems and in the other crashes.
Since the crash occurs in the DirectX libraries it may depend on the graphics card drivers or some other component of the system.