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Go over to Microsoft research and grab the Detours Library. One of its examples does exactly what you are asking. The whole library basically makes detouring/rerouting win32 function calls extremely easy. Its pretty cool stuff.
Edit: Also note that if you just want to look at the export table, you can (at least in visual studios) set your project properties to print out the export/import tables. I can't remember the exact option but should be easy to google.
**Edit2:**The option is Project Properties->Linker->Debugging->Generate MapFile ->Yes(/MAP)