Predefined values as arguement

Here's my question...I have a function in a class that accepts a string argument.  I want to predefine the possible values that can be passed as this arguement.  Let's use colors as an example.

Public Function DoSomething(ByVal strColor As String) as String

Select Case strColor
   Case "red"
      ' Code here
   Case "blue"
      ' Code here
   Case "green"
      ' Code here
End Select

End Function

Given that code, how can I force the object calling this method to select from a list of red, blue, and green.  It seems like I should be able to create a collection of colors and declare the argument as my collection but that didn't work.  Seems like this should be easy enough.
jayhAsked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
Ryan_231Connect With a Mentor Commented:
use an enum

Public Enum Color
  Red = 1
  Blue = 2
  Green = 3
End Enum

then in your function

Public Funtion DoSomething(c as Color) As String
  Select Case c
    case is = Red
     'code
    case is = Blue
     'do something
  End Select

  or you can do this

  Select Case c
    case is = 1
     'code for red
    case is = 2
      'code for blue
  End Select
End function

note when you call the function you will have to do it like this

Dim myColor AS Color
myColor = Red
call DoSomething(myColor)
0
 
jayhAuthor Commented:
Thanks, I knew it was something simple but I just couldn't remember what it was.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.