Scroll picture through draging on picture, without using scroll bars

Hello every one
My appliction is to hold and drag the picture without using scroll bars . ( Like we drag the map in google maps ) 
I have started but not able to complete 
Please see the attached vi
Attachments:
Map scrolling.vi ‏1052 KB

This is called panning and you can find an example in this thread - http://forums.ni.com/t5/LabVIEW/Move-picture-inside-of-the-picture-control/m-p/623697?view=by_date_d...
The Code Capture Tool also includes an example of this in its source code (the preview of the capture can be panned), which also demonstrates one way of handling only some of the mouse move events (which is important, because usually there are too many events and you want to discard some of them).
Try to take over the world!

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