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Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Dec 21, 2001



Application Security Testing: An Integral Part of DevOps

Fill a Combo with Available Drive Letters

To create a drop-down control with a list of used or unused drive letters, place two ComboBox controls on a form, named Combo1 and Combo2, and include this code to initialize the lists:
Private Declare Function GetLogicalDrives Lib _
"kernel32" () As Long
Private Sub Form_Load()
FillCombo Combo1, True
FillCombo Combo2, False
End Sub
Private Sub FillCombo(cbo As ComboBox, _
ByVal bUsed As Boolean)
Dim DriveNum As Long
For DriveNum = 0 To 25
If CBool(GetLogicalDrives And (2 ^ _
DriveNum)) = bUsed Then
cbo.AddItem Chr$(Asc("A") + _
DriveNum) & ":"
End If
Next DriveNum
End Sub
Brian Dial
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