[quote=428553:@Michel Bujardet]I see a solution in plain Xojo that should work Xplat :
Instead of using a dialog, use a false modal :
Grab the screen content, then pop a window, maximize it and use the grabbed picture of the screen.
Then display a regular window instead of the dialog. Since the maximized window will prevent clicking underneath, the regular window is the only place where click has effect. So it behaves like a modal.
From that regular window, you can show any window or dialog you want.
When closing the false modal, close the maximized false screen background.[/quote]
Are you serious? 