I'm using the NTaskDialog at the moment for replacing the standard message box support.  Works great for this.  I'd like to position this message box a specific place on the screen.  I mainly need to do this because I'd like to show a message centered over my NDocument window.  The TaskDialogDisplayPosition.CenterParent centers over the whole application when the NTaskDialog owner is an NDocument.

I noticed I can do this:

NTaskDialog dlg = new NTaskDialog();

... fill in dlg contents, etc.

dlg.DisplayPosition = TaskDialogDisplayPosition.Manual;

NRectangle nrect = new NRectangle();

nrect.X = 100; nrect.Y = 100;

I then can call dlg.Show(owner, nrect);

However, unless I also specify the nrect.Width and nrect.Height to be non-zero my position is not used and its centered on the screen instead.  I'd like to know the NTaskDialog's height and width in calculating the correct position.  How can I determine its width and height before calling NTaskDialog.Show() ?

Obviously, I can stop using the NTaskDialog and write my own message box form but you've gone to all this effort and I'd like to take advantage of your work.