OpenCL functions undefined

I’m just getting started with OpenCL, and am having some trouble getting the syntax highlighting working in Visual Studio 2010 express. Im using the Cuda Toolkit 5.0 with OpenCL 1.1 on an Nvidia graphics card. I’ve looked at a few tutorials and I’ve copied usertype.dat into C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE, but I’m still not getting any form of syntax highlighting in .cl files. In a few of the tutorials said there might be a .dat file already in the folder, and to merge usertype.dat onto it, but I didn’t see one. How do I fix this?