Using Web Browser ActiveX control with multiple threads in CVI

[gilg]

Hi Scott,

The change you suggested works perfectly, thank you.

I have a couple of questions regarding the changes you made:

If I create a panel on a different thread using the PostDeferredCallToThread (to create it on the main thread as a child panel), must I also use PostDeferredCallToThread for all the panel related operations? (Change the value of text boxes, change color of decorations, etc.) is there a written explanation on this subject?

Why did you choose to use the CreateThread function (WIN API) and not the cmtScheduleThreadPool function (CVI)?


Thanks again,

Gil

[Scott Y]

Hi Gil,

I had changed the function used to start new threads purely as a trouble shooting step. There should not be any issues with starting the threads using your first method.

After taking closer look at your application, there is really no advantage to creating new threads for each panel. Each new panel must be loaded in the same thread as your main panel for it to be a sub panel. All the work is being done by this main panel thread in this case, so there is no reason to spawn a new thread for each panel. I would suggest illuminating the multithreading and creating each sub panel with a callback function in the same thread as the main panel.

Scott Y
NI

[gilg]

Hi Scott,
I understand it now and will use your advice.

Regards,

Gil

[bilalD]

For future reference, you can find more information about creating multi threaded user interfaces using CVI in the CVI Help Content. Under the Contents tab, go to Library Reference >> User Interface Library >> Multithreading.

Hope this helps