DirectX9 Screenshot help

I have a VB.NET form and have coded it to grab a screenshot in the following way:

1. Create Device for Currunt Form which has Focus
2. Create Surface from CreateOffscreenPlainSurface
3. Get Device Front Buffer
4. Save the surface to file

Any ideas on how i can get it to work without having to have focus off the current form and take the screenshot regardless of what application i am in would be appreciated!!!

Its driving me insane!

Thanks in advance :D

You can just use Alt+PrintScreen in order to take a screenshot. It puts it into the clipboard and paste it in paint :D

Get the back buffer