Reports

Use CallByName or Reflection as discussed here:

Dynamically invoke properties by string name using VB.NET

Example:

Private Class Calculations
    Public Function calc(ByVal ParamArray args() As Integer) As Integer
       Return args(0) * 2
    End Function
End Class
Dim args(1) As Integer
args(0) = 2
Dim result = Microsoft.VisualBasic.CallByName(calculator, "calc", Microsoft.VisualBasic.CallType.Get, 7)

'result = 14

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