Sends a command to the client specified in AGUIDTo parameter.
function SendCmdToGUIDUser(Cmd: TRVCmd;
AGUIDFrom, AGUIDTo: TGUID): Boolean;
This method is similar to SendCommandToGUID, but does not have a group parameter and it frees the command object itself.
Cmd is a command to send. The method frees this object itself.
AGUIDFrom must be equal to GUIDMy property of the server (unless you want to simulate a command from another client).
AGUIDTo identifies the addressee (GUIDMy property of the client's receiver)
False if the command cannot be sent (for example, this user is not connected), True otherwise.