[Gambas-user] Finding the Draw event name of controls not in gb.form or gb.gu.base

Bruce Steers bsteers4 at gmail.com
Thu Dec 22 13:21:43 CET 2022

I have figured out a way to modify controls by simply making a class of the
same name and overriding the Draw event.

For example Label.class
I make a class called Label.class
Then by looking at the gb.gui.base/Label.class source i can see that the
Draw event is called UserControl_Draw()
So in my Label.class I can do the following example to add a gradient

' Gambas class file


Public Sub UserControl_Draw()

  Paint.Rectangle(0, 0, Me.W, Me.h)
  Paint.Brush = Paint.LinearGradient(0, 0, 0, Me.H, [Color.Yellow,
Color.Red], [0, 1])
  Paint.Background = Me.Foreground



That overrides UserControl_Draw, does my thing, then runs the

Now my question is for if i want to the a similar thing to say HBox.class

I cannot find HBox.class to find the name of the Draw event to override it.

Is it possible to find the event method names of a native control?

Many thanks
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