System plugin hlelp: shlwapi.dll

[Comperio]

I'm trying to call the 'IsOS' function of shlwapi.dll.

MSDN link:
http://msdn.microsoft.com/library/de...thers/IsOS.asp

Unfortunately, when I use Dependency Walker on Shlwapi.dll, I don't see the IsOS function on the list of functions. (each time I try to call it using the system plugin, I get an error returned.)

I belive my syntax is correct (see sample below):

code:


   StrCpy $1 8 ; to detect win2k or higher

   System::call "shlwapi.dll::IsOS(i r1)i .r2"

I've tried other values for $1 too, but always $2 returns 'error'.

My current version of shlwapi.dll on Win2k is 6.0.2800.1612.

Ultimately, I'm trying to determine if an installation is being run on a terminal server or not and this was the only function I've found so far that should work the same on any flavor of Windows.

Any comments/suggestions are welcome.