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cInt := 128         ; Correct
wInt := 2147483776  ; Wrong

MsgBox, % "Correct:`t" NumToBits( cInt, 32 )
        . "`nWrong:`t" NumToBits( wInt, 32 )

NumToBits( Num=0, bits=32 ) {
 Loop %bits%
      bin := bin ( Num >> ( bits - A_Index) & 1)
Return bin
}

 no1 := 2147483776 ^ 0x80000000 ; hex way
 no2 := 2147483776 ^ 2**31      ; use bit position
 no3 := 2147483776 ^ 2147483648 ; decimal way

 msgbox % no1 " " no2 " " no3

Int1 := 0xFFFFFFFF         ; Set all bits ON
Int2 := Int1 & 0x03FFFFFF  ; Set first 6 bits OFF

MsgBox, % NumToBits(Int1) "`n" NumToBits(Int2)


NumToBits( Num=0, bits=32 ) {
 Loop %bits%
      bin := bin ( Num >> ( bits - A_Index) & 1)
Return bin
}

MsgBox % MakeMask(32-6)

MakeMask(bit1="",bit2="",bit3="",bit4="",bit5="") {
   mask = 0xFFFFFFFF ; -1 for 64-bit masks
   Loop {
      i := SubStr(A_Index,0) ; needed with SetFormat Integer, Hex
      IfEqual bit%i%,, Break
      mask ^= 1 << bit%i%
   }
   Return mask
}

A = 00000000000000000000000000000001 = 1
B = 00000000000000000000000000000010 = 2
C = 00000000000000000000000000000100 = 4
D = 00000000000000000000000000001000 = 8
E = 00000000000000000000000000010000 = 16
F = 00000000000000000000000000100000 = 32
G = 00000000000000000000000001000000 = 64
H = 00000000000000000000000010000000 = 128
I = 00000000000000000000000100000000 = 256
J = 00000000000000000000001000000000 = 512
K = 00000000000000000000010000000000 = 1024
L = 00000000000000000000100000000000 = 2048
M = 00000000000000000001000000000000 = 4096
N = 00000000000000000010000000000000 = 8192
O = 00000000000000000100000000000000 = 16384
P = 00000000000000001000000000000000 = 32768
Q = 00000000000000010000000000000000 = 65536
R = 00000000000000100000000000000000 = 131072
S = 00000000000001000000000000000000 = 262144
T = 00000000000010000000000000000000 = 524288
U = 00000000000100000000000000000000 = 1048576
V = 00000000001000000000000000000000 = 2097152
W = 00000000010000000000000000000000 = 4194304
X = 00000000100000000000000000000000 = 8388608
Y = 00000001000000000000000000000000 = 16777216
Z = 00000010000000000000000000000000 = 33554432
[ = 00000100000000000000000000000000 = 67108864
\ = 00001000000000000000000000000000 = 134217728
] = 00010000000000000000000000000000 = 268435456
^ = 00100000000000000000000000000000 = 536870912
_ = 01000000000000000000000000000000 = 1073741824
` = 10000000000000000000000000000000 = 2147483648

OnMessage( 0x219, "WM_DEVICECHANGE" )
Return

WM_DEVICECHANGE( wParam, lParam ) { ; http://msdn2.microsoft.com/en-us/library/aa363480.aspx
 Global Drv
 Static DBT_DEVICEARRIVAL := 0x8000 ; http://msdn2.microsoft.com/en-us/library/aa363205.aspx
 Static DBT_DEVTYP_VOLUME := 0x2    ; http://msdn2.microsoft.com/en-us/library/aa363246.aspx

 /*
    When wParam is DBT_DEVICEARRIVAL lParam will be a pointer to a structure identifying the
    device inserted. The structure consists of an event-independent header,followed by event
    -dependent members that describe the device. To use this structure,  treat the structure
    as a DEV_BROADCAST_HDR structure, then check its dbch_devicetype member to determine the
    device type.
 */

 dbch_devicetype := NumGet(lParam+4) ; dbch_devicetype is member 2 of DEV_BROADCAST_HDR

 If ( wParam = DBT_DEVICEARRIVAL AND dbch_devicetype = DBT_DEVTYP_VOLUME )
 {
 
 ; Confirmed lParam is a pointer to DEV_BROADCAST_VOLUME and should retrieve Member 4
 ; which is dbcv_unitmask

   dbcv_unitmask := NumGet(lParam+12 )
 
 ; The logical unit mask identifying one or more logical units. Each bit in the mask corres
 ; ponds to one logical drive.Bit 0 represents drive A, Bit 1 represents drive B, and so on
 
   Loop 32                                           ; Scan Bits from LSB to MSB
     If ( ( dbcv_unitmask >> (A_Index-1) & 1) = 1 )  ; If Bit is "ON"
      {
        Drv := Chr(64+A_Index)                       ; Set Drive letter
        Break
      }
   SetTimer, DriveData, -1           
 }
Return TRUE
}

DriveData:
 DriveGet, Type  , Type  , %Drv%:
 DriveGet, Label , Label , %Drv%:
 DriveGet, Serial, Serial, %Drv%:
 MsgBox, 262144, Media Insert Notification [ Drive %Drv%: ]
       , Type:`t%Type%`nLabel:`t%Label%`nSerial:`t%Serial%
Return

MsgBox % DllCall("ntdll\RtlFindLeastSignificantBit",Int64,100) ; LS bit is at pos 2
MsgBox % DllCall("ntdll\RtlFindMostSignificantBit", Int64,100) ; MS bit is at pos 6