Для 32-битной Windows, Teamviewer версии [X]
[HKEY_LOCAL_MACHINE\SOFTWARE\TeamViewer\Version[X] ]
"ClientID"=dword:xxxxxxxx
Для 64-битной Windows, Teamviewer версии [X]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\TeamViewer\Version[X] ]
"ClientID"=dword:xxxxxxxx