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### excel vba long to bits

By Excel Hero on May 27, 2020
``````Function LongToBits\$(ByVal n&)
Dim i&
LongToBits = "00000000000000000000000000000000"
If n And &H80000000 Then
Mid\$(LongToBits, 1, 1) = "1"
n = n And Not &H80000000
End If
For i = 32 To 2 Step -1
If n And 1 Then Mid\$(LongToBits, i, 1) = "1"
n = n \ 2
Next
End Function

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

MsgBox ByteToBits(0)			'<--displays: 00000000000000000000000000000000
MsgBox LongToBits(293781237)	'<--displays: 00010001100000101011111011110101
MsgBox ByteToBits(-1)			'<--displays: 11111111111111111111111111111111
``````

7

### excel vba is bit set long

By Excel Hero on Feb 05, 2021
``````'Extremely fast VBA function to test if a specified bit is set
'within a 32-bit Long integer.

'Bits are numbered from 0 to 31, so the first (least significant) bit
'is bit 0.

'Note: we do not inspect bit 31, the sign bit.
'Note: any number of bits can be specified in one call.

Function LongBitIsSet(theLong&, bit As Byte) As Boolean
Static i&, b&()
If (Not Not b) = 0 Then
ReDim b(0 To 30)
For i = 0 To 30
b(i) = 2 ^ i
Next
End If
If bit < 31 Then LongBitIsSet = theLong And b(bit)
End Function

'------------------------------------------------------------------
MsgBox LongBitIsSet(255, 7)             '<--displays: True
MsgBox LongBitIsSet(230, 0)             '<--displays: False
MsgBox LongBitIsSet(16384, 14)          '<--displays: True
MsgBox LongBitIsSet(-16383, 0)          '<--displays: True
MsgBox LongBitIsSet(&H7FFFFFFF, 0)      '<--displays: True

``````

20

### excel vba check if bit is set in integer

By Excel Hero on Feb 05, 2021
``````'Extremely fast VBA function to test if a specified bit is set
'within a 16-bit Integer.

'Bits are numbered from 0 to 15, so the first (least significant) bit
'is bit 0.

'Note: we do not inspect bit 15, the sign bit.

Function IntegerBitIsSet(theInteger%, bit As Byte) As Boolean
Static i&, b%()
If (Not Not b) = 0 Then
ReDim b(0 To 14)
For i = 0 To 14
b(i) = 2 ^ i
Next
End If
If bit < 15 Then IntegerBitIsSet = theInteger And b(bit)
End Function

'------------------------------------------------------------------
MsgBox IntegerBitIsSet(255, 7)      '<--displays: True
MsgBox IntegerBitIsSet(230, 0)      '<--displays: False
MsgBox IntegerBitIsSet(16384, 14)   '<--displays: True
MsgBox IntegerBitIsSet(-16383, 0)   '<--displays: True

``````

22

### vba bits to byte

By Excel Hero on Feb 03, 2021
``````'Extremely fast VBA function to convert a binary string to a Byte:

Function BitsToByte(bits\$) As Byte
Dim i&
Static b() As Byte
If LenB(bits) > 16 Then Exit Function
If LenB(bits) = 16 Then
b = bits
Else
b = String\$(8 - Len(bits), "0") & bits
End If
For i = 0 To 14 Step 2
BitsToByte = 2 * BitsToByte Or (b(i) Xor 48)
Next
End Function

'Example:

MsgBox BitsToByte("00001100")		'<--displays: 12
MsgBox BitsToByte("10000001")		'<--displays: 129
'
'
'
``````

31

### excel vba set bit in byte

By Excel Hero on Feb 05, 2021
``````'Extremely fast VBA function to test if a specified bit is set
'within a Byte.

'Bits are numbered from 0 to 7, so the first (least significant) bit
'is bit 0.

Function ByteBitIsSet(theByte As Byte, bit As Byte) As Boolean
Static i&, b() As Byte
If (Not Not b) = 0 Then
ReDim b(0 To 7)
For i = 0 To 7
b(i) = 2 ^ i
Next
End If
If bit < 8 Then ByteBitIsSet = theByte And b(bit)
End Function

'------------------------------------------------------------------
MsgBox ByteBitIsSet(255, 7)      '<--displays: True
MsgBox ByteBitIsSet(230, 0)      '<--displays: False

``````