I try write in Remote Registry :

Const
C_TARGET_KEY = 'SOFTWARE\DiviCom\DiviCast\Mode 1';

Reg := TRegistry.Create;
Reg.RootKey:=HKEY_LOCAL_MACHINE;

if not Reg.RegistryConnect('\\'+'RemoteComp') then
ShowMessage(RemoteComputer + ' not connected')
else
ShowMessage(RemoteComputer + ' connected !!!') ;

Reg.RootKey:=HKEY_LOCAL_MACHINE;
Reg.OpenKey(C_TARGET_KEY, TRUE);
Reg.Writestring('OlegTest', 'OlegTest');

I connect to remote computer successfully ,but key is build in My COMPUTER REGISTRY (NOT REMOTE COMPUTER REGISTRY )
Please help me !!

P. S. I speak russian ,but not have r. keybord

Yes it is working now thank you MIKLUHA.