It’s been a year since the last post. Time does fly, now I see. Here is quick tidbit that I am using now a days.
http://support.citrix.com/article/CTX118974
HKEY_LOCAL_MACHINE \SOFTWARE\Citrix\ICAClient\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Keyboard\
Value Name: TransparentKeyPassthrough
Type: REG_SZ
Value: FullScreenOnly, Remote, or Local
Remote applies the Windows hotkeys to the window in focus.
Local never applies the Windows hotkeys to the session.
I am using ‘Remote”. Life seems easy.
Edit: 04/14/2011 – Looks like the settings are different for windows 7 64 bit. I will post on that soon.
Testing and ... 
#1 by Greg on May 22, 2011 - 1:24 pm
Win7 64 bit is working for me by following the same path but starting with HKEY_CURRENT_USER instead of HKEY_LOCAL_MACHINE.
Thanks for this posting! Not being able to alt-tab in Citrix RDP was killing me!
#2 by Niaz Zaman on May 23, 2011 - 2:09 am
Thanks a lot Greg. I am planning to do it right now for the windows 7.
#3 by Shanthi on July 19, 2018 - 7:07 am
where should we type this
#4 by Aswath on July 28, 2011 - 5:52 am
thanks a lot Greg!
#5 by ScottyBoiler on August 10, 2011 - 12:04 pm
Thank you – finally working in Win7. Sounds silly but not being able to alt-tab inside citrix was driving me nuts
#6 by Henrik on August 22, 2011 - 9:34 am
Thank you so much! I had been searching the web for hours before I found this post. I was about to go mad…
#7 by Bhaskar on March 15, 2012 - 12:04 am
Hi All,
i have an issue here with this Alt + Tab. dont know whether this work around will work in my environment. please have a look at the below details.
we had installed Citrix XenApp 6.5. we had published one application called on base. users are having multi monitors. they opens on base via Citrix ICA session and one local application in their local desktop. they will copy data from the application which they opened locally from their machine and paste that data in the on base application which is opened via ICA session. now the problem is when they point mouse pointer some where in on base application and they will press Alt + Tab button to shift to the local application then they will copy data and tries to paste it the on base application. but the mouse pointer in the ICA session goes some where. i mean it is not in a position which we kept in previous state. so users have to manually point the mouse again there and have to paste it. so how can i make the mouse pointer to stay there only where users had put the mouse pointer in the previous state ? the same thing is working fine in T farm ( Terminal Farm ), but its not working in ICA session. please give me a suggestion as this is a big issue here in our environment. thanks in advance. i had tried Local Resources option in web interface. like on the remote computer, on the local machine and in full screen but no use. i have to do any changes in XenApp server or in users machine ? users have Citrix receiver installed on their local machine.
#8 by Bhaskar on March 15, 2012 - 1:05 am
Hi Guys,
for 64-bit windows 7 machines you can try this key instead of HKCU. HKCU means only the current user wil get this settings. HKLM means who ever loggin to the machine they will get this settings. one doubt for me that this settings i should do in users machine or in xenapp servers ?
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Keyboard
“TransparentKeyPassthrough”=
#9 by Niaz Zaman on March 15, 2012 - 10:52 pm
I believe it would be local machine.
#10 by Bhaskar on March 15, 2012 - 11:23 pm
yeah i got it but i did not done these changes in registry. simply i had changed in web interface that in xenapp site session settings and local resources then i had changed display from seamless window to 1024*768 resolution. now Alt + Tab is working for me. it seems seamless window have some problem
#11 by Felipe Pazetto on June 30, 2012 - 2:01 pm
Have anyone found how to enable alt+tab when the regedit is blocked by the administrator?
#12 by niazzaman on December 3, 2012 - 12:03 pm
I don’t know yet for sure. May be someone else might know.
#13 by Jonathan on October 3, 2012 - 7:21 am
Thank you so much for that tip. It worked like a charm for me. Very concise information. Thanks to Greg also for the Win7 64 bit variant.
#14 by Test on November 28, 2012 - 11:04 am
Absolutely amazing… life saver… i was going crazy without the ALT-TAB working properly… THANK YOU!!!
#15 by David Hrncir on January 10, 2013 - 9:32 am
Thanks. That was getting really old.
#16 by Akshay on March 14, 2013 - 2:03 am
Earlier this trick had fixed this issue…but not sure whats wrong… now it isn’t working…
#17 by niazzaman on April 9, 2013 - 2:41 pm
It’s working for me in windows 7. Sometime it does not work the first time. But after few tries it always works. Not sure why it does not work always work at first alt+tab.
#18 by Justin Forman on April 9, 2013 - 1:54 pm
Thank you!!!
#19 by Tobias on November 21, 2013 - 5:05 am
It worked great for me on Windows 7 and 8. I was so happy. But then I upgraded to 8.1 and now it’s not working again. Anyone who has a solution for 8.1 users?
#20 by Ashwini Srivastava on February 23, 2014 - 6:50 am
Does any one how to enable it when you are connected through Mac?
#21 by niazzaman on February 24, 2014 - 2:38 pm
Come to think of it, I never tried it through mac. My company is using Citrix java now, which looks really small in Mac firefox and does not even work in Safari. So, I just use windows.
#22 by Pure Logic Solutions on February 28, 2014 - 1:47 am
Many thanks! That was stellar 🙂
#23 by Vivek on April 15, 2015 - 3:27 am
Hi,
I have used the tip to change the Transaparent KeyThrough to “Remote”. but still ALT+Tab is not working in Citrix machine. My Machine is Win 7, 32 bit .
Please help me on this..Thanks
#24 by Abishek on May 27, 2015 - 6:01 am
In Mac Command+Alt+Tab would do it, need to find out how to change it.
#25 by Camusensei on August 16, 2015 - 12:53 pm
Awesome, you just made my day. I tried FullScreenOnly without success, but “Remote” is working perfectly.