Easiest would be to make a series of incrementally rotated images using a image editing program and placed them sorted by angle into a picture ring indicator. I have attached a simple example that does 90 deg increments (LabVIEW 7.0) using 4 frames.
If you don't requre the need to set the angle programmatically, but have it spinning continuously, simply place an animated gif on the front panel. (Make sure that the FP option "Play animated Images" is checked. The attached example also contains an animated image for demonstration.)