App Verifier & WICGrinder
In the previous post about WICGrinder, this tool for verifying WIC CODEC behavior was introduced. As an added bonus, this tool can be utilized with other tools, such as App Verifier to catch some pretty nasty bugs. If you have a WIC CODEC, under a debugger (choose your favorite) run a debug copy of your code under WICGrinder with App Verifier enabled on the WICGrinder exe.
Have fun!