DoControl
return RLogicalChannel::DoControl(aFunction, a1);
return RLogicalChannel::DoControl(aFunction, a1, a2);
E32BootChannel->DoControl(KE32BootSetSafeAddress, safeAddress);
E32BootChannel->DoControl(KE32BootBootNetBSD, netbsd, bootinfo);
virtual TInt DoControl(TInt, TAny *, TAny *);
protected: IMPORT_C virtual int DoControl(int,void *,void *);