I think it was Jim Booth who used to say this in his sessions. It's a valuable lesson one shouldn't forget. Given that frmDialog.SCX is a form with just one label and the following code in the Init:

In my session "Crashing VFP and preventing crashes" I show that displaying a corrupted image in a grid crashes Visual FoxPro. There's actually more to that as such a crash isn't limited to invalid images.