The ANSI C examples are not installed by default. You'll need to enable their installation by going to Add/Remove programs and double clicking on National Instruments Software. From the list in the pop-up window choose NI-DMM 3.0.6 and press the modify button from the next pop-up window, navigate to Modular Instruments>>NI-DMM 3.0.6>>Microsoft Visual C++ Support and right click and select to "Install This Feature to Local Drive".
Once this is done installing you should be able to find the examples by going to Start>>All Programs>>National Instruments>>NI-DMM>>Examples
Jonathan L. Technical Support Senior Group Manager National Instruments