Hi Frog186,
You can do this a couple ways.
Complicated Way:Write a function so that when you press a specific key it takes the current bitmap on the screen (basically saves a screenshot into a bitmap slot) and saves it into the project folder.
Easy Built-In, But Requires Looking Way: Press F9 while you're running your program under DarkBasic and DB will take a screenshot of the code and save it in your DarkBasic folder. All the screenshots are named things like "snapshot1" though, so you'll have to go hunting.
Windows Kinda Out of the Way Way: Press Print Scrn on your keyboard (above insert, to the left of F12, to the right of Scroll Lock) and Windows will copy whatever is on the screen as a picture to the clipboard. Then just go into something like MS Paint and press PASTE, and voila! Screenshot.
Crazy Donut Productions
Current Project: KillZone