Sub Command1_Click()
   Select Case Text1.Text
      Case "Hello"
         Msgbox "Welcome!"
      Case "Goodbye"
         Msgbox "See you again soon!"
      Case Else
         Msgbox "You said something else"
   End Select
End Sub

This retrieves the value of Text1.Text and then tests it against each case. If Text1.Text is equal to "Hello" then a message box is displayed saying "Welcome".  If Text1.Text is equal to "Goodbye" then a message box is displayed saying "See you again soon". If Text1.Text is equal to something else then a message box is displayed saying "You said something else".

' Initialise variable
Dim Number As Integer
Number = 8
Select Case Number    ' Evaluate Number.
Case 1 To 5    ' Number between 1 and 5.
    Msgbox "Between 1 and 5"
Case 6, 7, 8    ' Number between 6 and 8.
    Msgbox "Between 6 and 8"
Case Is > 8 And Number < 11    ' Number is 9 or 10.
    Msgbox "Greater than 8"
Case Else    ' Other values.
    Msgbox "Not between 1 and 10"
End Select

This code evaluates the variable Number, and then runs the appropriate code. Note you need to use the statement Is if you are using comparison operators (i.e. = ,<=, > )