Graphics.ClearRectangle
From Xojo Documentation
Method
Graphics.ClearRectangle(X As Double, Y As Double, Width As Double, Height As Double)
New in 2019r2
Supported for all project types and targets.
New in 2019r2
Supported for all project types and targets.
Clears the rectangle described by the parameters passed by filling it with the background color of the parent window (on Windows/Linux) or by clearing the context so that the background comes through (on Mac).
Sample Code
This code clears the entire drawing area:
g.ClearRectangle(0, 0, g.Width, g.Height)