Here is my contribution to that discussion.
It's a slightly modified version of
typo's example. It uses a unit named
SwfFileInfo to get the dimensions of the SWF file. But maybe is TMozPluginPanel able to do it by itself?
The website where I found that unit seems to have disappeared. It was the site of Delphi SWF SDK.
The example comes with a Flash sample, an EPD/FEN viewer made with Flash Pascal.
Download