windows code troubling Qt

[jacek]

What about those copies? Do you create only one object of CWAB class?

This is the culprit
if(m_hinstWAB)
FreeLibrary(m_hinstWAB);

It's more a workaround, than a solution, but maybe you should load it before you create QApplication and free it after QApplication::exec() returns? Or maybe you should try to load it using QLibrary?

[munna]

What about those copies? Do you create only one object of CWAB class?

Yes I create only one object and its deleted once the window is closed.

maybe you should load it before you create QApplication and free it after QApplication::exec() returns?

But I don't need it through out the application. Only when user needs to access the Windows Address Book, I need to load the library. And once user is done, I free it.

Or maybe you should try to load it using QLibrary?

ok, will try that. But what will happen if I do not call FreeLibrary(m_hinstWAB); ?

[jacek]

But what will happen if I do not call FreeLibrary(m_hinstWAB); ?

Nothing, if everything is implemented well. In worst case windows will think that this library is used by a non-existent process. Of course if you will create more than one CWAB object, you'll get a resource leak.

Maybe you should try to reproduce that problem using a sample application? That crash might have more than one cause.

[munna]

Maybe you should try to reproduce that problem using a sample application?

hmm, I am not sure what do you mean by that. I have a windows only code which accesses the windows address book and it works perfectly. I integrated that code with Qt code and it crashes the application

That crash might have more than one cause.

When I comment those two lines, the app works perfectly (no crashes). But when I uncomment those lines, it crashes in the same place.

May be I am missing something.

Thanks a lot!

[jacek]

hmm, I am not sure what do you mean by that. I have a windows only code which accesses the windows address book and it works perfectly. I integrated that code with Qt code and it crashes the application

So far we know that Qt + FreeLibrary() == crash. The question is: which part of Qt clashes with FreeLibrary().