RtlStringFromGUIDEx

INT64 __fastcall RtlStringFromGUIDEx(const _GUID *const Guid, _UNICODE_STRING *GuidString, UINT8 Allocate){
  wchar_t *StringRoutine; 
  unsigned __int16 MaximumLength; 
  if( Allocate )
  {
    GuidString->MaximumLength = 78;
    StringRoutine = (wchar_t *)ExpAllocateStringRoutine(0x4Eui64);
    GuidString->Buffer = StringRoutine;
    if( StringRoutine )
    {
      MaximumLength = GuidString->MaximumLength;
LABEL_4:
      GuidString->Length = 76;
      swprintf_s(
        GuidString->Buffer,
        (unsigned __int64)MaximumLength >> 1,
        (WCHAR *)L"{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}");
      return 0i64;
    }
    return 3221225495i64;
  }
  else
  {
    MaximumLength = GuidString->MaximumLength;
    if( MaximumLength >= 0x4Eu )
      goto LABEL_4;
    return 3221225507i64;
  }
}

Referenced by: