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Tip of the Day
Language: VB4/32,VB5,VB6
Expertise: Intermediate
Jul 4, 2001

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Making a form appear as if it is disabled

By changing the WS_CHILD style bit of a window, you can make it appear as if it is disabled, even if the form is fully active and functional. These are the statements you need:

Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" _
    (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" _
    (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Private Const GWL_STYLE = (-16)
Private Const WS_CHILD = &H40000000

Private Sub Command1_Click()
    ' set the WS_CHILD bit
    SetWindowLong Me.hwnd, GWL_STYLE, GetWindowLong(Me.hwnd, _
        GWL_STYLE) Or WS_CHILD
End Sub
Francesco Balena
 
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