How to allow fullscreen on dual monitors with Flash 10.1.85.3

NPSWF32.DLLBecause Adobe Flash does not allow the user to move outside the animation or video while in fullscreen mode, slight alterations are needed with each release.  If you are interested in allowing Flash to be in fullscreen mode while working on other things, follow the steps below.  This will only work for Adobe Flash 10.1.85.3. If you have an earlier version, it is highly recommended that you upgrade due to a recently discovered security vulnerability. (upgrade to Adobe Flash 10.1.85.3)

  1. Download a free hex editor if you don’t already have one.
  2. Exit your web browser, and any other applications.
  3. Open NPSWF32.dll in your hex editor. If you are using Windows 7 or Vista, you will have to run the application as an administrator. (Right-click on application executable and click Run as administrator)
    • 32-bit: C:WindowsSystem32MacromedFlash
    • 64-bit: C:WindowsSysWOW64MacromedFlash
  4. Search for 180DA7 (in XVI32, go to Address menu and click Go to).
  5. Look for the following sequence: 48 74 39 83 E8 07 …
  6. Change 74 39 to 90 90.
  7. Before you save this file, you may want to make a backup, just in case something goes wrong.
  8. Save NPSWF32.dll.

Once you are finished, open up a video in fullscreen mode on YouTube or another video site.  You should now be able to work within Word, Firefox, etc., while watching any Flash video in fullscreen!

16 thoughts on “How to allow fullscreen on dual monitors with Flash 10.1.85.3”

  1. Hello,

    thanks for the description, but it doesn’t worb by me.
    I found the 74 39 and I changed it to 90 90 but it doesn’t work. Can you help?

    f4ceman

  2. Fantastic! Thank you…as a casual computer user, these steps were easy to follow and gave me exactly the result I needed.


  3. f4ceman:

    Hello,
    thanks for the description, but it doesn’t worb by me.
    I found the 74 39 and I changed it to 90 90 but it doesn’t work. Can you help?
    f4ceman

    It did not work initially for me also but I ended up fixing it by removing the backup file from the MacromedFlash dir. The only dll in the Flash directory should be the NPSWF32.dll that you changed.

    For some reason if the backup file, which I named NPSWF32_original.dll, is in that directory, the changes won’t work.

    For some reason wh

  4. I have win 7 and flash 10.1.85.3
    I don’t have the offet shown: 180DA7
    or string 48 74 39 83 E8 07 …
    I have located a similar string: 48 74 39 83 E8 11 75 … @ 8ED70
    I backup files (of course) and tried to change the 74 & 39 values to 90 90 but it didn’t work, flash still minimises when it isn’t the target window =(
    Any suggestions/fixes?

  5. Hi, I can’t get past step 3…. I don’t have a NPSWF32.dll in the suggested folder, or in fact, anywhere on the hard drive at all!

    All I have in “c:windowssystem32MacromedFlash” are these 4 files:
    Flash10k.ocx
    FlashInstall.log
    FlashUtil10k_ActiveX.dll
    FlashUtil10k_ActiveX.exe

    Yet flash is definately installed and working (BBC IPlayer works fine). When I goto help > about, it tells me it is working and that I have version “10.1.85.3” installed.

    Any ideas?

  6. Hey! it worked very fine with FireFox, but not with ie8

    I use win7 x64

    changed to 90 90. But I still want to use ie8 for some reasen, is there any workaround for ie8?

    Thanks in deep for your tips… From Swe blatte

  7. Hey! it worked very fine with FireFox, but not with ie8

    Now, I can have fullscreen with both at the same time :)

    I use win7 x64

    changed to 90 90. But I still want to use ie8 for some reasen, is there any workaround for ie8?

    When exiting, everytimes it works with [Esc]

    Thanks in deep for your tips… From Swe blatte
    ..

  8. Hey! it worked very fine with FireFox, but not with ie8

    Edit: I found solution for IE8 too (worked), This is the adress:

    http://deve.loping.net/projects/ignoflash/

    Now, I can have fullscreen with both at the same time

    I use win7 x64

    changed to 90 90.

    When exiting, everytimes it works with [Esc]

    Thanks in deep for your tips… From Swe blatte

    It is possible to remove the message “press esc for exit fullscreen mode” but that would be another history…

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