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2's complement in VB

  1. Jan 19, 2007 #1
    is there a function available that will perform 2's complement on a byte?
    or a way to convert a byte or char to binary so I can do the operation myself?

  2. jcsd
  3. Jan 19, 2007 #2


    User Avatar
    Science Advisor

    It should be pretty simple. All you need to do is perform a bitwise NOT and then add a 1. You would convert your byte or char to an Int, perform the bitwise Not, and then add a 1. In C# the ~ is the bitwise NOT, so you would do:
    Code (Text):

    int b = 230;
    int bAfter2sC = ~b + 1
    In VB.Net try:
    Code (Text):

    Dim b As Integer
    Dim bAfter2sC As Integer
    bAfter2sC = Not(b) + 1
    Last edited: Jan 19, 2007
  4. Jan 19, 2007 #3
    thank you very much again!
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