One of my favorite programs for customizing Windows is TClock Light. Unfortunately, this program doesn't work on XP x64, which I now use as my main OS. Given that I have no knowledge about writing or compiling C, I'd like to know how I can at least recompile it for 64 bit platforms. I [s]think[/s] hope I'll be able to troubleshoot on my own if anything else needs to be changed .

Sorry for being a bit late, just trying to be helpful.  I currently use VS 2008.  There is an option under:

Project->Properties->Configuration Properties->C/C++->General->Detect 64-bit Portability Issues

I looked at the source and they have been very kind in not providing me with any easy project files for VS to use.  But if you were determined, you could build your own project file and try compiling with that setting on and see how to tweak the code.