Getting your legacy app to run
So this is a real life example of getting a legacy app to run. It might not be a one-trick-fixes-all document, however in my case it did the trick. My job was to install a very old app. on our Citrix XenApp environment (W2K3/XA45HRP7). After installing the app on WinXP I tought easy job. However the app just wouldn’t run on Windows Server 2003. After enabling Windows 95 Compatibility mode on the executable the app. started working.
To enable this for your users you need to import the HKCU section of the registry with a new key. You can do this via Group Policy Preferences or a loginscript of some sort. The key you need to import is this:
Valuename: C:\Program Files\.......\.......\your.exe
Valuedata: WIN95 (seperate more values with a space)
A complete list of all compatibility settings below.
|WIN4SP5||Windows NT 4.0 SP5|
|WINXPSP2||Windows XP SP2|
|WINXPSP3||Windows XP SP3|
|WINSRV03SP1||Windows Server 2003 SP1|
|WINSRV08SP1||Windows Server 2008 SP1|
|DISABLETHEMES||Disable Visual Themes|
|640X480||Run in 640 x 480 screen resolution|
|HIGHDPIAWARE||Disable display scaling on high DPI settings|
|256COLOR||Run in 256 colors|
|DISABLEDWM||Disable Desktop Composition|
|RUNASADMIN||Run program as an administrator|
For me that did the trick on RDP. However the app. just wouldn’t launch via ICA.
After some googling I found out that a lot of people experience this with legacy apps.
My solution was adding a new regkey in the HKLM part
For more information about this key see this document.