<@UGU4JA9CL> Here's a demo with a pair of examples...

# tornadofx

[carlw]

@Manpreet Singh Here's a demo with a pair of examples. The top button brings up a modal dialog without any OS window controls including the close button. The button button uses setOnCloseRequest, but on the modalStage object and within the onDock function.

modalStage_Sets_OnCloseRequest.java

[Manpreet Singh]

Thank you Carl. I will try this out.