UINT64 Plugin for REALbasic 5 and higher allows you to construct programs which can handle unsigned 64-bit integers. You can use the arithmetic operators +, -, *, / with UINT64 numbers. And they can be compared with each other. UINT64 numbers can be saved to and retrieved from a MemoryBlock, using its LittleEndian property or a user-defined Boolean.
What's new in UINT64 Plugin
Version 1.1 now allows implicit use of the LittleEndian property of a MemoryBlock.