ikrananka: I found a workaround that works great and results in complete elimination of the annoying title bar and border. This was posted by "Manwith Noname" over at the B-17 forums on Steam where the same problem exists (
https://steamcommunity.com/app/328900/discussions/0/620695877499699854/#c537405286658879878).
Do Once 1. Download
WinExplorer by Nirsoft.
2. Extract the contents of the zip file to a convenient folder and set the compatibility of the winexp.exe file to Windows XP SP3.
Do Every Time 1. Run B-17 so that the windowed game screen is shown.
2. Alt-Tab back to Windows.
3. Run Winexp as an Administrator.
4. In the list of windows shown, click once on "B-17 - The Mighty Eighth" so that it is highlighted.
5. Select the "Style" tab in the area below the list of windows.
6. Uncheck "WS_DLGFRAME" and "WS_BORDER"
7. Close the WinExplorer program.
7. Alt-Tab back to B-17
That's it - the game should now be shown without any title bar or border.