http://www.canaimasoft.com/f90VB/Overview.htm

f90VB is a set of four Fortran libraries that provide the functionality necessary for your Fortran programs to gain access to COM/ActiveX objects. In addition, you can use f90VB to call Visual Basic DLLs from your Fortran applications, or to create Fortran DLLs that are able to handle intrinsic Visual Basic data types (like VB's strings, arrays or variants). f90VB also includes TLView, a professional quality Type Library browser, that can be used as a tool to explore COM/ActiveX objects you are using from your Fortran applications.