How do I callbyname a module and corresponding subroutines within the module VB.NET

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I am trying to connect to multiple modules which have different rules per department.

I have a department combobox which hosts the names of the department

the name corresponds to the Module name

so if I pick Finance department

callbyname(finance, "Process", CallType.Method)

but when I try this I get-

System.MissingMemberException: 'Public member 'finance_Process' on type 'String' not found.'

What am I doing wrong?

What I have tried:

I researched callbyname there seems to be a decent amount on a form using Me as the reference point. However, not much on how to access a module from a form using callbyname.

Posted 24-Nov-22 19:49pm

Member 11856456

Updated 24-Nov-22 22:59pm

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Richard Deeming · Accepted Answer · 2022-11-24T22:59:00

The CallByName function[^] exists purely for background-compatibility with VB6. It can only call members on an instance of a class; it cannot call Shared members - which is what all members of a module are - because VB6 didn't have such members.

You're going to need to use reflection instead, which is what CallByName uses behind the scenes:
Reflection - Visual Basic | Microsoft Learn[^]

Eg:

VB.NET

Dim moduleType As Type = Type.GetType(finance)
If moduleType Is Nothing Then Throw New InvalidOperationException("Module '" + finance + "' not found.")

Dim methodInfo As MethodInfo = moduleType.GetMethod("Process", BindingFlags.Public Or BindingFlags.Static)
If methodInfo Is Nothing Then Throw New InvalidOperationException("Module '" + moduleType + "' does not contain a method called Process.")

methodInfo.Invoke(Nothing, Array.Empty(Of Object)())