.NET2
I have a panelChild that is on the panelParent that is in the Form1.

When panelParent_Resizes panelChild does a panelChild_HeavyOperation.

panelParent rezizes multiple times in InitializeComponent of Form1 and consume a lot of time because of panelChild_HeavyOperation.

I decided to reduce the panelChild_HeavyOperation only when the Form1 is shown and has a defined size.

by eg. like this:

Sub panelChild_HeavyOperation
 If not FindForm().IsShown then Reuturn
 ' .... '
End Sub 

The problem is that IsShown does not exist on a Form...