What is the keyin to load a mvba?

I want to execute a mvba function from c#.

I can run the macro once the module is loaded but need to know how to load the module.

I tried macro open "E:\ExportDGN\VBA\ExportToCAD.mvba"

and macro open E:\ExportDGN\VBA\ExportToCAD.mvba

but it comes up with;
Compilation failed at line 1

Syntax error