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Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Const GWL_STYLE = (-16)
Private Const WS_MINIMIZEBOX = &H20000Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As LongPrivate Sub Command1_Click()
Dim n As Long
n = GetWindowLong(Me.hwnd, GWL_STYLE)
SetWindowLong Me.hwnd, GWL_STYLE, n - WS_MINIMIZEBOX
End SubPrivate Sub Command2_Click()
Dim n As Long
n = GetWindowLong(Me.hwnd, GWL_STYLE)
SetWindowLong Me.hwnd, GWL_STYLE, n + WS_MINIMIZEBOX
End Sub