in my program buttons change between enabled:=true and enabled:=false. I like that it is visual for the user. But unfortunately the buttons changes the layout only when I entered by mouse. I tried to implement Button.Repaint. But this statement seems not to be available in TMSWebCore. Is that right? How can I realize that?

Many thanks

In TMS WEB Core, it is Button.Invalidate;

That works. Thanks!