The shutter control is not available for the selected camera
This VB example uses the minimum and maximum shutter values to initialize the slider control:
Private SubForm_Load() Slider1.Min = ActiveDcam1.GetShutterMin
Slider1.Max = ActiveDcam1.GetShutterMax
Slider1.Value = ActiveDcam1.Shutter
If the currently selected camera doesn't support software shutter control, the method will generate an error.