MsgCommunicator: Delphi Instant Messaging (IM) SDK
for easy creation of custom messenger system
Determines if user specified by UserID is connected to this server.
function IsUserConnected(const UserID: Cardinal): Boolean;
Call IsUserConnected to check if the user with specified UserID identifier is currently connected to this server or not. IsUserConnected returns True if specified user is already connected; otherwise returns False.