LabWindows/CVI panel handle question

[imanon]

In debugging a multi-panel GUI application, I noticed that several of the panel handles were not unique. Is this normal??? Is there a way to guarantee unique panel handles to be returned when using the LoadPanel() command for different PanelResourceIDs? Thanks,

aj

[MJF]

I don't see how it would be possible for duplicate handle values to be assigned. Looking at functions like HidePanel(), DiscardPanel() and similar ones, they only take a single handle parameter. The only way I can see functions like that working would be if all handles assigned were unique.

Are you sure you are seeing duplicate handle values?

[imanon]

thanks for the reply. I am seeing duplicate panel handles because I was inadvertantly closing my panels out, thereby freeing the panel handle to be used by new panel as it loads. I am going to fix that this morning by loading all my panels at startup & thereafter using the HidePanel & DisplayPanel functions. I appreciate your response.

[MJF]

Ah, now that makes sense. Loading and unloading panels would definitely have the effect you were seeing. You will probably have better performance as a result of doing things with HidePanel but then again you might not. It will all depend on how much memory your machine has and how many panels you are using.

[imanon]

thanks again. I modified my code this morning to load all panels up front. I had some side effects as a result of that, associated w/ the radio controls on the panel. Though I realize that loading a panel each time it's called up is probably not optimum, I went back to that approach & the side effects w/ my panel controls disappeared. I think I'll stick w/ this model for now, unless there is a compelling reason not too. I could fix the side effects but I'm not sure the time is justified when it seems to work fine as is. Right now, each time a panel is called up, I load it, manipulate the control settings, display & then then discard the panel when the user clicks a "Done" button. My panels don't have large groups of data associated w/ them so the time to load/discard them doesn't appear to be an unecessary load on system resources. Thanks for your time & help.