fortran dll to be called from Visual basic

[carlasilva]

How do I build the dll from fortran to be called within Visual basic interface?

Thank you for your help

 

[chiph]

It depends on the capabilities of your Fortran compiler. Easiest is to have it produce a COM DLL (rather unlikely, given that it's Fortran).

Next easiest is for it to produce a Win32 DLL, with the exported functions using the dllexport (aka stdcall) calling convention (somewhat more likely).

Check your compiler documentation under "Windows interoperability".

Chip H.

 

[john24]

I've done this with both DEC and Lahey compilers, it's not well written up in the DEC manual but Lahey has all you need. you basically need to replace your program statement with a subroutine statement and add an export line (or 2 for DEC). then just declare the dll in vb as you would any other dll and it's there for your use.

 

[carlasilva]

And how can I pass by reference a two dimentional array from vb 6 to visual fortran dll?

Thank you very much for your help.
carla