Windows NT / Hide-show Application

Jeg skal kun Hide-show min Application
fra task manger (ctrl + alt delete)
Under NT

følgene virker under win95/98

function RegisterServiceProcess (dwProcessID, dwType: DWord) : DWord;
stdcall; external \'KERNEL32.DLL\';

Procedure SetRegisterService(Value: Boolean);
  const
    RSPSIMPLESERVICE = 1;
    RSPUNREGISTERSERVICE = 0;

Begin
  fRegisterService := Value;
  if Value Then
    RegisterServiceProcess(GetCurrentProcessID, RSPUNREGISTERSERVICE)
  else
    RegisterServiceProcess(GetCurrentProcessID, RSPSIMPLESERVICE);
End;

Men hvad under NT?