XL98: How to Populate One ListBox Based on Another ListBox

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1. Close and save any open workbooks, and then open a new workbook.
2. On Sheet1, enter the following values:

        A1: North Carolina  B1: Charlotte  C1: Charleston  D1: Charlottesville
        A2: South Carolina  B2: Greensboro C2: Columbia    D2: Norfolk
        A3: Virginia        B3: Raleigh    C3: Greenville  D3: Richmond
   						

3. Start the Visual Basic Editor (press OPTION+F11).
4. On the Insert menu, click UserForm.
5. Draw two ListBox controls on the UserForm.
6. Draw another ListBox control on the UserForm
7. Double-click the UserForm to display the Code window for the UserForm.
8. In the module, type the following code:

          Private Sub UserForm_Initialize
   
             ' Populate ListBox1.
             ListBox1.List = Worksheets("Sheet1").Range("A1:A3").Value
   
          End Sub
   
   
          Private Sub ListBox1_Click()
   
              ' Get the currently selected item
              Select Case ListBox1.Value
   
                  ' If North Carolina, set List property of ListBox2
                  ' to Column B.
                  Case "North Carolina"
                      ListBox2.List = _
                          Worksheets("Sheet1").Range("B1:B3").Value
   
                  ' If South Carolina, set List property of ListBox2
                  ' to Column C.
                  Case "South Carolina"
                      ListBox2.List = _
                          Worksheets("Sheet1").Range("C1:C3").Value
   
                  ' If Virginia, set List property of ListBox2 to
                  ' Column D.
                  Case "Virginia"
                      ListBox2.List = _
                          Worksheets("Sheet1").Range("D1:D3").Value
   
              End Select
   
          End Sub
   						

9. Run the UserForm.
   
   When you choose one of the items in ListBox1, the list in ListBox2 is updated, reflecting the choice you made in ListBox1.
10. Close the UserForm.