Use string in another sub

Question

I am aware I'm not the first to have this question. Still I cannot find the solution. I have some vba code for my solidworks, that works fine. However, I want to use a string that I defined in one sub, in another sub. This seems harder than I thought.

My code - simplified:

Public FolderName As String
Public Sub SaveFiles()
   FolderName = "SOLID"  
End Sub

Public Sub UserInput(Parameter1, Parameter2, Parameter3...as string) 'A lot of input from a userform
  For i = LBound(ArrayList) To UBound(ArrayList)
    Debug.Print "FolderName = ", FolderName 'THIS PRINTS EMPTY AND I WANT IT TO PRINT "SOLID"
  Next
End Sub

I use public subs and a public string. I cannot add FolderName to Sub UserInput(FolderName), because then I get the compile error "Argument not optional" for my Call UserInput() that is written in my Userform

What can I do to solve this?

Answer 1

Public Sub UserInput(ParameterX As String, Optional FolderName As String = "a better default")

  doTheThings
End Sub