Using Qt in a AEGP plugin. QWidget can't get after effects as parent window

Question

Hey guys,
     I'm trying to use the qt framework to create a user interface for my AEGP plugin. And I'm running into some problems.
     First, I tried to pass the main HWND into a QWidget, but the QWidget can't seem to recognize it as a parent window. My code looks like this,
A_Err err = A_Err_NONE;
AEGP_SuiteHandler suites(basicSuiteP);
HWND handle;
ERR(suites.UtilitySuite5()->AEGP_GetMainHWND(&handle));
qt tt(handle);
tt.show();
qt is a child class inherit from QDialog with a custom constructor
qt::qt(HWND hWand) :QDialog()
  create((WId)hWand);
  setModal(true);
The qt window did show up, but it can't block user's interaction with after effects' main window. When a QDialog pops up, it will block user's interaction with its parent window until it's closed. But it doesn't seem to work with after effects.
And, I'm wondering, is it possible to add a QWidget to after effects' native panel? For now, my qt window is floating as a separate window. can I  just add my qt widgets into a after effects panel so it can dock into after effects' main window?

Answer 1

FCP doesn't work with H.264 files. It might bring it in, or it might not. It might seem like it's working, but then sync drifts. It might look like it's fine, but when you export different sections jump to other clips. It's unpredictable. 
FCP 7 and H.264 do not mix.
If you are exporting files out of AE on a PC, then look at exporting them as DNxHD...the Avid codec. or Cineform. Then the FCP user will need to install the Avid codec or Cineform in order to see the file, but then they should convert it again to ProRes 422...as working with non-FCP codecs in FCP can be problematic.  I recommend those formats over the others, like ANIMATION or UNCOMPRESSED...because of the file size issues. 
If you are using AE on a Mac, the same computer as FCP...then export as ProRes right away. Done and done.