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how to detect event in another image window

Hi
I have 2 image windows (using IMAQ WindDraw) displayed.  Window #1 is an image browser.  When I click on one of the browser images, Window #2 with the selected image is displayed.

I want to be able to detect when the user closes Window #1.  I can use IMAQ WindLastEvent to detect a close event but it will also detect when the user closes Window #2. 

Attached vi is modified from the NI Browser Example (examples\Vision\2. Functions\Display).  I'm using Labview 7.1.  Any ideas or suggestions?

Thanks,
sau

Message Edited by sau on 06-24-2007 09:49 PM

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