Use the "IMAQ WindLastEvent" VI in a while loop to find out if a "Click event" has occurred. If a click event occurs you can then use the "Imaq WindZoom" VI with the "Get/Set Status? (Set)" set to F to get status. The "Center Point" status coming from the "Imaq WindZoom" VI will then give you the x and y coordinates that you are looking for.
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