List Boxes

Methods: 

• lstBox.Clear -- Clears the list box. 
  
• lstBox.AddItem item -- Adds an item to the list box. 
  
• lstBox.ListCount -- Returns the number of items in the list box. 
  
• lstBox.RemoveItem index -- Deletes item at index 
  
• lstBox.List (index) -- Returns the item at index 
  
• lstBox.Selected (index) -- Indicates (if true) that the item at index has been selected 

Properties:

• lstBox.Text -- Returns the selected item in the list box
  
• lstBox.ListIndex -- Sets or returns the index of the currently selected item in the control 

Populating a List Box at Design Time:

To populate a list box at design time, select the list box by clicking on it, then select the List property in the Properties window.  Click the down arrow, and begin typing the list items, ending each line with a Ctrl-Enter.  When you have completed your entries simply hit the Enter key. 

Tricks

To force the list box to display (move focus to) the most recent addition to the list box:

lstBox.ListIndex = lstBox.NewIndex

To synchronize two list boxes in order to display related elements (such as student name in one box and grade in another):

Private Sub lstBox1_Scroll( )
       lstBox2.TopIndex = lstBox1.TopIndex
End Sub 

Private Sub lstBox2_Scroll( )
       lstBox1.TopIndex = lstBox2.TopIndex
End Sub

To reset a list box so that entries are no longer highlighted, first set the list index to 0 and then reset it to -1.

lstBox.ListIndex = 0
lstBox.ListIndex = -1