How to put BT radio to sleep mode in system initialization in 40NBT in WM/CE platforms?

By setting this registry, SleepMode, can put the BT radio to sleep mode in system initialization. By default it?s 0. [HKEY_LOCAL_MACHINE\SOFTWARE\Summit\BT] "SleepMode"=Boolean: 0 = FALSE; 1 = TRUE (default is 0)