Capture Printing Command

[Samuel & Kim Blight]

I want to capture a print command, so that when someone prints to the colour
laser, a dialogue box appears and says "Do you really need to print in
colour". If yes is selected, it will print and if no is selected it won't.
I have vb and can create the dialouge box etc, but I can't find out how to
capture the print job and release it based on the decision made...

Can anyone point me in the right direction?

Many thanks