Collition DEtection in Games

[vidiware]

I have VB.NET with image boxes (just an easy game):

What is a fast (Both coding and CPU usage) way to test if:

Image1 is inside Image2, and then execute the sub Sub1()?

________
| |
| Pic1 _|_____
| | | |
|_____|_| Pic2 |
|______|

Can anyone make some easy code?

 

[divil]

If Panel1.Bounds.IntersectsWith(Panel2.Bounds) Then 'Execute sub here