Illustrated in this example is a simple emailer that supports attachments.
In order to use the code provided in the sample project, you must have CDOEX.DLL. I am not sure if I'm authorized to provide this with the project, so, to be on the safe side, I won't. You can download the CDO Libraries from Microsoft.com, however. CDOEX.DLL is Microsoft CDO for Exchange 2000 Object Library.
In addition to CDOEX.DLL as a reference, I used two components for convenience's sake: Microsoft Common Dialog Control and Microsoft Windows Common Controls 6.0.
I hope you find this small sample as useful as I do.