The Art of Delphi Programming – In the ancient days of Windows XP and Delphi 7 I used to provide a preview of the proprietary file content inside the file open dialog of one of my applications. This was accomplished by deriving from TOpenDialog, just like the TOpenPictureDialog does that comes with Delphi itself. The drawback was that since Windows Vista this was no way to go when you wanted to use the new Vista style dialogs. This was an even more nuisance as the new dialogs already come with a preview ability – so why not use it directly? Googling a bit reveiled that others have to fight with the same problem, but no ...
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