It's often very useful to run the VS tools outside of Visual Studio.
To do this, run the Visual Studio Command Line which sets up the command prompt with the correct PATH environment.
Start -> Programs -> Visual Studio .Net 2003 -> Visual Studio .Net Tools -> Visual Studio .NET 2003 Command Prompt
e.g. you could use this to run
dumpbin /exports mydll.dll
which will display the exported function names.