Positioning Sheets

From https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/Sheets/Tasks/PositioningSheets.html

Changing the sheet attach position requires implementing a method, which means using a subclass. Is there any possibility this can be done in Xojo? I’m betting not, but figured I’d ask.

Actually, it’s a delegate method. That makes it more possible.