How to show excel files inside the WinForms webbrowser control.
You must have OWC up and runngin on your machine.
Go to ./src and run build.bat. The output will be at ./bin.
There's no .sln or .csproj file in here, just plain old C# compiling from the command line using csc.exe. If you wanna use VS, make sure your build targets the x86 platform. Otherwise, it ain't gonna work.
You can see some commets about the interesting bits of the code at my blog