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LV7.1 Troubles to get a "Region of Interest" with the "get last event" method

Hello !
 
When using the "get last event" method on a displayed image, I can't get a ROI input : the method never returns a type=2 and doesn't draw the rectangle on the image.
 
Moreover, I experience a behaviour I don't quite understand with the command array for the "which event" parameter : the left hand value is a digit, and switches the right hand value from "no event"  to "draw event" and son on,.. but I can't understand what the left hand digit is exactly used for.
I want the method to let me draw a ROI and returns the coordinates, just like the "extract example.vi" - that came in the VISION application - does .
 
Many thanks in advance for any help
 
Thierry
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Hello Thierry,

I done something you are looking for times ago. I'll give it to you in attachement of this email. In this application you can select a ROI as you want.

Enjoy,
Julien Roland - District Sales Manager
NI Belgium - Technical Support

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