'Fast VBA function to test if specific bits are set
'within a 16-bit Integer. If ALL specified bits are set then
'this function returns True. If ANY of the specified bits are
'not set then this function returns False.
'Bits are numbered from 0 to 15, so the first (least significant) bit
'is bit 0.
'Note: bits can be specified in any order.
'Note: any number of bits can be specified in one call.
Function IntegerBitsAreSet(theInteger%, ParamArray bits()) As Boolean Static i&, b%() If UBound(bits) = -1 Then Exit Function If (Not Not b) = 0 Then ReDim b(0 To 14) For i = 0 To 14 b(i) = 2 ^ i Next End If For i = 0 To UBound(bits) If bits(i) < 0 Then Exit Function If bits(i) > 14 Then Exit Function If (theInteger And b(Int(bits(i)))) = 0 Then Exit Function Next IntegerBitsAreSet = True
End Function
'----------------------------------------------------------------------------------------
MsgBox IntegerBitsAreSet(255, 7) '<--displays: True 255 = 00000000 11111111
MsgBox IntegerBitsAreSet(230, 0) '<--displays: False 230 = 00000000 11100110
MsgBox IntegerBitsAreSet(85, 0, 2, 6, 4) '<--displays: True 85 = 00000000 01010101
MsgBox IntegerBitsAreSet(85, 0, 2, 5, 4) '<--displays: False 85 = 00000000 01010101
MsgBox IntegerBitsAreSet(485, 2, 7, 5) '<--displays: True 485 = 00000001 11100101
MsgBox IntegerBitsAreSet(24585, 14, 13, 3) '<--displays: True 24585 = 01100000 00001001
'
'
'

Public Function MakeInteger%(LoByte As Byte, HiByte As Byte) If HiByte And &H80 Then MakeInteger = ((HiByte * &H100&) Or LoByte) Or &HFFFF0000 Else MakeInteger = (HiByte * &H100) Or LoByte End If
End Function