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excel vba binary string to long

By Excel Hero on May 27, 2020
``````'Fast VBA function to converst binary string to a Long Integer:

Function BitsToLong&(bits\$)
Dim i&
Static b() As Byte
If LenB(bits) > 64 Then Exit Function
If LenB(bits) = 64 Then
b = bits
Else
b = String\$(32 - Len(bits), "0") & bits
End If
For i = 2 To 62 Step 2
BitsToLong = 2 * BitsToLong Or (b(i) Xor 48)
Next
If (b(0) Xor 48) Then BitsToLong = BitsToLong Or &H80000000
End Function

'-----------------------------------------------------------------------------

MsgBox BitsToLong("1")									'<--displays:  1
MsgBox BitsToLong("10")									'<--displays:  2
MsgBox BitsToLong("0110")								'<--displays:  6
MsgBox BitsToLong("0100101")							'<--displays:  37
MsgBox BitsToLong("100000000000000000000")				'<--displays:  1048576
MsgBox BitsToLong("11111111111111111111111111111111")	'<--displays:  -1
``````