How to catch the movement of return on investment when the user drags a handful of return on investment?

Hello, I use VDM2009 with c#. I need to make some manipulations of KING and need to intercept mouse movements, but do not know what to use. For example, suppose I created a KING OvalContour and that it is a circle (width = height). I have to do 2 things: 1) when the user drags one of the 4 handles, I need to check what handle is moved so that I can drag a few adjacent programmatically so that the circle is a circle and does not become an oval.

(2) when the user clicks/behind the center of the circle, I need prevent the update so that the circle does not move the return on investment. (It would be even better if there was a way to disable the movement of the circle and allow the scale.) I don't know what to use to accomplish this behavior and do not know how to retrieve the KING handles about which is slipped. Any help would be very appreciated. Thank you, Neville

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Hello Ben,

Thanks again for your help.  I looked up the definitions for the ROILeft, etc., in the reference VB help as you suggest.  While many objects is similar in setting/name, it seems that these objects (ROILeft, etc.) are those who are not easy to find how to use in the c# version.  But thanks for pointing me to the help file in VB Ref.  I wish, in there wasn't one for c#... I can't understand how to search effectively in the Visual c# help file that is integrated into Visual Studio.

Thanks for your suggestion about the return on investment.  It makes sense, and I'll keep it in mind.

In the meantime, I found a solution to my problem.  I use c# function public bool PreFilterMessage (ref Message objMessage) for prefilter mousedown and mousemove event messages.  Once I found one, I check if the cursor is on a part of the KING that I care.  If I want to do something special, I'm doing it right here.  If I want to keep the normal behavior of the KING OR on mousedown and mousemove, I trash the message.

It's a total pain, but it seems that functions NOR are not put in place to do this kind of things in an elegant way.  Thanks again for your help!

Neville

Tags: NI Hardware

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