Apply different masks on application window

[Lucrian]

Hello,

I want to know if I can apply different masks each time I run the application.
For example, I have a standard butterfly mask, but for Halloween, when somebody run the application (on that specific date), I want to have a pumpkin mask. So, my application should be in different shape.
Is it possible?

Thank you!

[Ulrich]

The documentation of Window.SetMask() has examples which demonstrate how to set a mask on the application window at runtime.

Ulrich

[Lucrian]

It is exactly what I need.
Thank you!