Set Parent window using User32 at lv7.1

Hello all,
I am using User32.dll to make a parent-child relationship between two VIs. I use SetParent function, and pass the handle of parent VI and child VI to this function. Now, after this relationship has been established, the child window postion is not fixed when refresh, attachment is my source code , Can anyone help me on this?
Thanks in advance!
Attachments:
Sample.zip ‏47 KB

I think there are actually several not necessarily related issues here. First of all when I tested this program in LabVIEW 8.6 (not having had an older version handy at that moment) the first thing I noticed, was that the VI never got parented at all. The reason was simply the data type mismatch in the handle between what Get Window Handle returns and what Add Child uses. Once I fixed that it worked like a charm with no jumping whatsoever.
So I did a test in LabVIEW 7.1 just now and indeed it does jump there. But, I wouldn't exclude that LabVIEW 7 migh have done it correctly for the OS (W2K) that was current at that time it came out. But there are really at least two solutions: Upgrade to a newer LabVIEW version, at least 8.6 works fine (8.2.1 didn't I just checked) or don't call the VI continously but let it run as an independant "process" and pass data by other means than through the connector pane (personally I would point out that globals are a bad way for this )
And by the way, almost all Windows handles are actually pointer sized entities so if you happen to use such window managment VIs in LabVIEw 8.6 or higher it is advisable to not configure them as U32 but as pointer sized (unsigned) integer instead
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

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Set Parent window using User32 at lv7.1

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