crc16 - Conversion issues In VBA Excel- Why HFFF is giving -1 in long and how to resolve it -

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i using vb in excel , creating macro crc16 bit calculation. when take values lookup table above 8000 ffff, giving negative numbers. got know numbers below range positive , numbers in range(8000-ffff) give negative result has converted. came across few functions these dont solve purpose

is possible conversion using simple function can correct result.

hffff gives -1 long variable want 65535.

i have used functions given here http://support.microsoft.com/kb/161304 not give me correct result when pass hex value hffff.

hexadecimal constants signed. described in vba spec: http://msdn.microsoft.com/en-us/library/ee199514.aspx

there 2 ways around issue:

1) use literal decimal

2) use ampersand type hint &hffff&


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