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Tip of the Day
Language: VB4/32,VB5,VB6
Expertise: Intermediate
Dec 9, 2000

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IsFormModal - Determines whether a form is modal

Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" _
    (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Const GWL_STYLE = (-16)
Const WS_DISABLED = &H8000000

' Return True if the form is modal
'
' Note: if an application has only one visible
'       form, this function considers it as modal

Function IsFormModal(frm As Form) As Boolean
    Dim f As Form
    
    For Each f In Forms
        If Not (f Is frm) Then
            If (GetWindowLong(f.hWnd, GWL_STYLE) And WS_DISABLED) = 0 Then
                ' there is another enabled form, so this form
                ' can't be modal
                Exit Function
            End If
        End If
    Next
    ' all other forms are disabled, therefore this form is modal
    IsFormModal = True
    
End Function
Francesco Balena
 
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