Even though the DLLs look the same for the Pocket PC and windows (e.g. System.dll) they are actually very different. So the way you are trying to do this wont work.
What you can do however is create a new Windows Class Library project, and add your existing .cs (or .
vb) files to it and compile that - so you are getting two different DLLs out of the end, but from one set of source files.
/- Sam Judson : Wrox Technical Editor -/