Mouse events not called in VB WPF, does z-order matter?

Question

There are many explanation in google, but I still struggling to implement mouse events.

• I have tried to use MouseEnter=\"Canvas1_MouseEnter\" in canva

Answer 1

UI elements in WPF do not receive mouse events (without mouse capture) outside their rendered area. A Panel (like your Canvas) does not render anything outside the area of its child elements unless you define a non-null value for its Background property.

You may set a Background for your Canvas like shown below, which makes it render the entire area defined by its ActualWidth and ActualHeight with a transparent brush: