[DevExpress Support Team: CLONED FROM T926311: Fixed Columns in Grid (New Feature) - Question about Pop up menu]
Stas,
The only other thing is that on the page I referenced above - the link to the Fixed Column project/demo does not work. It does not take me anywhere.
dxdemo://Win/XtraGrid/MainDemo/FixedColumns is the link that does not work - on the following page:
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This issue could take place if DevExpress demos aren't installed on your machine.
Please make sure that they are installed. For this, you can launch the installer and check the Demos tile.
To make the System launch demos, the DevExpress installation adds the DemoCenter path to this registry path: HKEY_CLASSES_ROOT\dxdemo\shell\open\command
So, if the demos are installed but cannot be launched, please check whether the HKEY_CLASSES_ROOT\dxdemo section exists in the registry.
If it exists, please also check the key value here: HKEY_CLASSES_ROOT\dxdemo\shell\open\command
Please try this and let me know your results.