I have adapted someone else's VB code to convert lat long to OSGB for UK locations. In essence my code converts a Google API location returned from a text search, into Eastings and Northings that can then be checked against the OS using (e.g.) StreetMap.
My conversions are only ball park correct, and I think I need to incorporate the Helmert Conversion, to get more accurate transformation.
Is there a VB savvy person out there who might be able to help me, if I posted up existing VB code?