Some posts in the help forum or bug reports have shown that the 32-bit limitation on some core functions can get annoying. Here's a simple UDF for a handful of functions built to work on native 64-bit AutoIt integers. It uses a trivial DLL (source attached) to invoke C functions. It contains the following functions, with a short example. _Div integer divide, _Mod integer modulus _BitAnd, _BitOr, _BitXor, BitNot _BitShift, _SignBitShift, _BitRotate _HexToInt64, _Int64ToHex