DLP4500: How can I turn on the internal trigger mode when using my own code in VS2010?

Part Number: DLP4500

Hi 

Have a good day!

We connect the DLP projector with a FLIR's BFS-U3-16S2C-CS camera. The trigger mode works fine when the projection sequence is set in the control software. However, when driving the camera using calibration code written in C++ (The enviornment is Windows 7, VS2010), the code gets stuck at the step of getting the camera image and stays waiting to get it, looking like the camera is not getting the trigger signal from the projector correctly. Therefore, the question is, how can I turn on the internal trigger mode when using my own code? Is there a copy of the C++ version code for controlling the projector?