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Message: [QUOTE="Hal Rosser, post: 574378"] Turning on bits is simple as addition turning them off is simple as subtraction some languages use a numer as a series of flagged bits to turn on the '64-bit' (the 7th ) in a variable - add 64 to it. to turn on the '8-bit' (the 4th bit) add 8. all you need to do is realize that the bits relate to powers of two use bitwise operators to check if specific bits are on. I have to review and play around with those bitwise operators every time before I use them. [/QUOTE]