Create a DLL to call an EXE

I have written a simple VB EXE to call the Lotus Notes class (Notes32.tlb) to send email.
Now I need to use the VB EXE from a database trigger. The bad thing is that the database trigger can only call a DLL.
So can a DLL call my VB EXE (which is currently calling another dll - the Lotus Notes Class)? Write such a DLL in VB or I can only use VC++. I am new to Visual C++. How do I go about doing this?

Thank you in advance.

If you make an ActiveX DLL in VB, then you can use COM from C++ to call it. However, COM is a bit over my head since I don't need it and as such didn't bother learning that behemoth of a technology ;)