Some C++ programmers develop Win32 API DLLs that can used from Visual Basic programs. Use the __stdcall prefix with functions exported from the C++ DLL that you want to access from VB 5.0. For example, the code in a simple Win32 DLL exporting GetMyComputerName using .def would be:

 .Def File contents::LIBRARY  DESCRIPTION "Some description"EXPORTS     GetMyComputerName        @1.CPP file contents::BOOL __stdcall GetMyComputerName(LPSTR szComputerName, LPSTR szErrorMsg){.......}

This function could be used in VB after declaring the following:

 Declare Function GetMyComputerName Lib "" (ByVal strComputerNameAs String, ByVal strErrorMsg As String) As Long