Well according to the MSDN DWORD is an unsigned integer with a range of 0 to 4294967295.
So ideally you should replace it with uint rather than int.
However, as you have spotted uint is non-CLS compliant so if your method is publicly visible you should use int and do the conversion. The corollary to that is that if your method isn’t used outside your assembly you should mark it as internal rather than public. Then you’ll be able use a uint.