Preventing 360 degree roatation of a knob

I am a beginner with LabVIEW. Is there a way to keep a knob control from roatating 360 degrees? In other words, stop when the "nedle" gets to the minimum or maximum value, instead of "flipping over"? Am I missing something simple? I know that a slider control would behave in a manner similar to what I want the knob to behave....
Thanks...

I tried to get a regular knob control to do this. Actually you can but the graphics is jerky because there is no filter event applicable in this situation. Seemed like a good use for an xControl (custom control) which is what I put together below. Its not perfect as I am having trouble getting some of the events to work properly (like setting it as an indicator) but it does do what you want through some trickery.
It looks like only one knob on the surface but there are actually two. The first one (which you can see) is an indicator and it shows all the updates and provides the data. Overlayed on this is another, invisible knob, which is what the user controls. When the invisible knob changes value it calculates the delta between itself and the indicator and, if the delta is within a value of 5, makes some updates. Perhaps some enterprising individual woule like to make some improvements on my initial try
Note:
If you want to modiy the control itself you will need to have the Professional version of LabVIEW... Eek. Also I made this with LabVIEW 8.0 so you would need this also...
Message Edited by Chaos on 12-29-2005 09:35 AM
Attachments:
DeltaKnob.zip ‏41 KB

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Cylinder_Plot_3D.vi ‏76 KB

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Preventing 360 degree roatation of a knob

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