Is library running on Citrix or Terminal Server? - Testing on existence/value of environment variable SESSIONNAME - Solution

bub buppeke at
Sat Jan 27 09:41:22 EST 2018

Hi Dough,

We have some personal settings that are saved as txt file in the
application folder.  This folder is shared on Terminal Server so settings
are less personal to say the least.  Even if i move my settings file to a
'home directory', i have issues as they make a kind of group login for
Terminal Server and further user login is through my app.  I am currently
looking into this, i don't know if i can insist with the hosting guys that
all login is 100% individual

All the best

On Jan 27, 2018 1:25 PM, "Doug Easterbrook" <doug at> wrote:

hi Phil/Bruno…

Just out of interest……  what reasons make you want to know if you are
running on terminal services???

A number of our customers run under terminal services — and we have had no
reason in the past to want to know.   so the underlying purpose is of
interest to me — in case I should want to know :)

thanks in advance.

Doug Easterbrook
Arts Management Systems Ltd.
mailto:doug at
Phone (403) 650-1978

see you at the third annual users conference <>

> On Jan 27, 2018, at 4:45 AM, Phil (OmnisList) via omnisdev-en <
omnisdev-en at> wrote:
> Hi Bruno,
> I had this code lingering, not used recently:
> Register DLL ('user32','GetSystemMetrics','AJ')      ;; jf - 21 aug 03 --
detect if running under Terminal Server
> Call DLL ('user32','GetSystemMetrics',4096) Returns
lbUsingTerminalServices     ;; 4096 = SM_REMOTESESSION
> May help you... or point you in a different direction...
> regards
> Phil Potter
> Based in Chester in the UK.
> On 26/01/2018 15:40, bub wrote:
>> Hey all,
>> I would love to find out if my library is running on Citrix or Terminal
>> Apparently, the environment variable SESSIONNAME is only defined on
Citrix or Terminal Server so that would be a way to find it out, even more
>> Citrix client => SESSIONNAME starts with ICA
>> Rdp client => SESSIONNAME starts with rdp
>> Console session => SESSIONNAME starts with console
>> Is there any DLL that can provide the value of an envirnoment variable
>> Ok, just did some more effort in scrolling through historic posts and
found similar construction to get username (which i changed now to
>> Register DLL ('kernel32','GetEnvironmentVariableA','ICCM')
>> Call DLL ('kernel32','GetEnvironmentVariableA','
>> So solution found, happy to share, might me be interesting for some
>> Bruno.
>> ---
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