DesktopMoviePlayer.ControllerSizeChanged
From Xojo Documentation
Event
DesktopMoviePlayer.ControllerSizeChanged()
New in 2021r3
Supported for all project types and targets.
New in 2021r3
Supported for all project types and targets.
The size of the controller has changed.
Notes
When a movie first starts this event fires and allows you read the ControllerWidth/Height properties and then resize the MoviePlayer and or window to best accommodate that size. The event also fires if the movie changes size "on its own."