I want to develop a performance counter to monitor our server concurrent connected devices (in total). That is, basically the same info displayed in WmTool "nnnn Connected Devices".

I know about the TApiGetMaxDevices, but that won't help me in this case.

Is it possible? Any advice?

The reason is basically monitor concurrent users high water marks and provision additional licenses before the limit is reached (since our users are clients, not internal users).