Using Winseed should be possible with all Windows compilers. As you probably will not be able to use an import library which has been created by Visual C++ you have to create an import library from the DLL, which is distributed as part of this package, itself. In the Borland world the utility implib can be used for that.
Another topic which should be mentioned is the DLL entry point function. Microsofts's Visual C++ provides a default implementation and therefore no explicit code is contained in Winseed. If your compiler requires you to explicitly implement a DLL entry point function it can be very simple: Winseed itself does not need any setup operations.