You can create an Invoke node by right-clicking on the graph (in edit mode, not run-time) and selecting Create >> Invoke Node from the pop-up menu. Then jump to the diagram and choose the "Get Image" method. Wire up your image depth (24 usually) and background color (you can use a color constant) and you get Image Data output that can be wired to a Picture Control function. Find one of those in the Graphics & Sound pallete under "Graphics Format". You can save to JPEG, PNG, BMP, etc.
Dan Press
Certified LabVIEW Architect
PrimeTest