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Monitor model and serial # information needed

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Is it possible to get the serial # and model of active monitors on a computer?

Digging in the forum I was able to get the following witch is still far from what I need:
EnumDisplayDevices(Index, ByRef DeviceName, ByRef StateFlags="", ByRef DeviceKey="") 
    ; DISPLAY_DEVICE DisplayDevice 
    VarSetCapacity(DisplayDevice, 424) 
    ; lpDisplayDevice.cb := sizeof(DISPLAY_DEVICE) 
    NumPut(424, DisplayDevice, 0) 
    VarSetCapacity(DeviceName, 32, 0) 
    VarSetCapacity(DeviceKey, 128, 0) 
    ; For consistency, clear StateFlags in case of failure. 
    StateFlags = 0 
    if ! DllCall("EnumDisplayDevices" 
        , "UInt", 0 
        , "UInt", Index-1 
        , "UInt", &DisplayDevice 
        , "UInt", 0) 
        return false 
    StateFlags := NumGet(DisplayDevice, 164) 
    DllCall("lstrcpynA", "Str", DeviceName, "UInt", &DisplayDevice+4,   "int", 32) 
    DllCall("lstrcpynA", "Str", DeviceKey,  "UInt", &DisplayDevice+296, "int", 128) 
    if (SubStr(DeviceKey,1,18)="\Registry\Machine\") 
        DeviceKey := SubStr(DeviceKey,19) 
    return true 
    Loop { 
        if ! EnumDisplayDevices(A_Index, DeviceName, StateFlags,DeviceID) 
        ;if (StateFlags & 4) 
            ;text .= DeviceName " is the primary display device.`n"
        if (StateFlags & 4)
            ;text .= DeviceName " is the primary display device.`n"
            text .= DeviceID "`n"
            EnumDisplayDevices(A_Index, DeviceName, Devicestring)
            text .=devicestring "`n"
            text .=devicename "`n"
        {if (StateFlags & 1) 
            text .=  DeviceName " is secondary monitor.`n" 
            text .=  DeviceID " `n"
    MsgBox %text%

Learning one
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This may help you - Win32_DesktopMonitor class. How to use example:
objWMIService := ComObjGet("winmgmts:{impersonationLevel=impersonate}!\\" A_ComputerName "\root\cimv2")
For objDeskMon in objWMIService.ExecQuery("Select * from Win32_DesktopMonitor")
	DeviceID := objDeskMon.DeviceID, PNPDeviceID := objDeskMon.PNPDeviceID, MonitorType := objDeskMon.MonitorType, MonitorManufacturer := objDeskMon.MonitorManufacturer
Msgbox %  DeviceID "`n"  PNPDeviceID "`n" MonitorType  "`n" MonitorManufacturer
See also WMI Tasks COM with AHK_L.

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On the sample you provided I get:
Error: This line does not contain a recognized action.

WMI Tasks COM with AHK_L I also get error messages for the sample provided.

Also have error messages from samples on
Win32_DesktopMonitor class

I don't know anything about VB :oops:

I'm running windows XP

Is is possible to have a working example?

Learning one
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Than I guess you are using AutoHotkey Basic, which is great, but made obsolete by AutoHotkey_L which is even better. Please upgrade to AHK_L and than run provided sample(s).

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Thanks. Once I updated from 104805 (basic) to version L the examples do work. I will be able to explore what I can do from there.

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I explored the WMIService option. It gave me very generic information. I found a vbs script the scan the registry. The information is extracted from the binary key "EDID". I will be using it launched by a compiled ahk the will include the following command:
runwait, Cscript "monitor info.vbs" %A_ComputerName%,,Hide
Option Explicit
DIM objFile
DIM objServerlist
Dim objNetwork
Set objNetwork = CreateObject("WScript.Network")
strComputer = objNetwork.ComputerName
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFile = objFSO.CreateTextFile(strComputer&"M.csv", True)
Set objServerlist = objFSO.OpenTextFile(strComputer&"M.csv", 1)

Dim WshShell
Set WshShell = WScript.CreateObject("WScript.Shell")
Dim strComputer, message
message = ""
Dim intMonitorCount
Dim oRegistry, sBaseKey, sBaseKey2, sBaseKey3, skey, skey2, skey3
Dim sValue
dim i, iRC, iRC2, iRC3
Dim arSubKeys, arSubKeys2, arSubKeys3, arrintEDID
Dim strRawEDID
Dim ByteValue, strSerFind, strMdlFind
Dim intSerFoundAt, intMdlFoundAt, findit
Dim tmp, tmpser, tmpmdl, tmpctr
Dim batch, bHeader
batch = False

If WScript.Arguments.Count = 1 Then
strComputer = WScript.Arguments(0)
' batch = True
strComputer = wshShell.ExpandEnvironmentStrings("")
strComputer = InputBox("Check Monitor info for what PC","PC Name?",strComputer)
End If

If strcomputer = "" Then WScript.Quit
strComputer = UCase(strComputer)

If batch Then
Dim fso,logfile, appendout
logfile = wshShell.ExpandEnvironmentStrings("%userprofile%") & "\desktop\MonitorInfo.csv"

'setup Log
Const ForAppend = 8
Set fso = CreateObject("Scripting.FileSystemObject")
If Not fso.FileExists(logfile) Then bHeader = True
set appendout = fso.OpenTextFile(logfile, ForAppend, True)

If bHeader Then
appendout.writeline "Computer,Model,Serial #,Vendor ID,Manufacture Date,Messages"
End If
End If

Dim strarrRawEDID()
'get a handle to the WMI registry object
On Error Resume Next
Set oRegistry = GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & strComputer & "/root/default:StdRegProv")

If Err <> 0 Then
If batch Then
EchoAndLog strComputer & ",,,,," & Err.Description
MsgBox "Failed. " & Err.Description,vbCritical + vbOKOnly,strComputer
End If
End If

sBaseKey = "SYSTEM\CurrentControlSet\Enum\DISPLAY\"
'enumerate all the keys HKLM\SYSTEM\CurrentControlSet\Enum\DISPLAY\
iRC = oRegistry.EnumKey(HKLM, sBaseKey, arSubKeys)
For Each sKey In arSubKeys
'we are now in the registry at the level of:
'we need to dive in one more level and check the data of the "HardwareID" value
sBaseKey2 = sBaseKey & sKey & "\"
iRC2 = oRegistry.EnumKey(HKLM, sBaseKey2, arSubKeys2)
For Each sKey2 In arSubKeys2
'now we are at the level of:
'so we can check the "HardwareID" value
oRegistry.GetMultiStringValue HKLM, sBaseKey2 & sKey2 & "\", "HardwareID", sValue
for tmpctr=0 to ubound(svalue)
If lcase(left(svalue(tmpctr),8))="monitor\" then
'If it is a monitor we will check for the existance of a control subkey
'that way we know it is an active monitor
sBaseKey3 = sBaseKey2 & sKey2 & "\"
iRC3 = oRegistry.EnumKey(HKLM, sBaseKey3, arSubKeys3)
For Each sKey3 In arSubKeys3
'Kaplan edit
strRawEDID = ""
If skey3="Control" Then
'If the Control sub-key exists then we should read the edid info
oRegistry.GetBinaryValue HKLM, sbasekey3 & "Device Parameters\", "EDID", arrintEDID
If vartype(arrintedid) <> 8204 then 'and If we don't find it...
strRawEDID="EDID Not Available" 'store an "unavailable message
for each bytevalue in arrintedid 'otherwise conver the byte array from the registry into a string (for easier processing later)
strRawEDID=strRawEDID & chr(bytevalue)
End If
'now take the string and store it in an array, that way we can support multiple monitors
redim preserve strarrRawEDID(intMonitorCount)
End If
End If
'now the EDID info for each active monitor is stored in an array of strings called strarrRawEDID
'so we can process it to get the good stuff out of it which we will store in a 5 dimensional array
'called arrMonitorInfo, the dimensions are as follows:
'0=VESA Mfg ID, 1=VESA Device ID, 2=MFG Date (M/YYYY),3=Serial Num (If available),4=Model Descriptor
'5=EDID Version
On Error Resume Next
dim arrMonitorInfo()
redim arrMonitorInfo(intMonitorCount-1,5)
dim location(3)
for tmpctr=0 to intMonitorCount-1
If strarrRawEDID(tmpctr) <> "EDID Not Available" then
'first get the model and serial numbers from the vesa descriptor
'blocks in the edid. the model number is required to be present
'according to the spec. (v1.2 and beyond)but serial number is not
'required. There are 4 descriptor blocks in edid at offset locations
'&H36 &H48 &H5a and &H6c each block is 18 bytes long

'you can tell If the location contains a serial number If it starts with &H00 00 00 ff
strSerFind=chr(&H00) & chr(&H00) & chr(&H00) & chr(&Hff)
'or a model description If it starts with &H00 00 00 fc
strMdlFind=chr(&H00) & chr(&H00) & chr(&H00) & chr(&Hfc)

for findit = 0 to 3
If instr(location(findit),strSerFind)>0 then
End If
If instr(location(findit),strMdlFind)>0 then
End If

'If a location containing a serial number block was found then store it
If intSerFoundAt<>-1 then
If instr(tmp,chr(&H0a))>0 then
End If
'although it is not part of the edid spec it seems as though the
'serial number will frequently be preceeded by &H00, this
'compensates for that
If left(tmpser,1)=chr(0) then tmpser=right(tmpser,len(tmpser)-1)
tmpser="Not Found"
End If

'If a location containing a model number block was found then store it
If intMdlFoundAt<>-1 then
If instr(tmp,chr(&H0a))>0 then
End If
'although it is not part of the edid spec it seems as though the
'serial number will frequently be preceeded by &H00, this
'compensates for that
If left(tmpmdl,1)=chr(0) then tmpmdl=right(tmpmdl,len(tmpmdl)-1)
tmpmdl="Not Found"
End If

'Next get the mfg date
Dim tmpmfgweek,tmpmfgyear,tmpmdt
'the week of manufacture is stored at EDID offset &H10

'the year of manufacture is stored at EDID offset &H11
'and is the current year -1990

'store it in month/year format
tmpmdt=month(dateadd("ww",tmpmfgweek,datevalue("1/1/" & tmpmfgyear))) & "/" & tmpmfgyear

'Next get the edid version
'the version is at EDID offset &H12
Dim tmpEDIDMajorVer, tmpEDIDRev, tmpVer

'the revision level is at EDID offset &H13

'store it in month/year format
tmpver=chr(48+tmpEDIDMajorVer) & "." & chr(48+tmpEDIDRev)

'Next get the mfg id
'the mfg id is 2 bytes starting at EDID offset &H08
'the id is three characters long. using 5 bits to represent
'each character. the bits are used so that 1=A 2=B etc..
'get the data
Dim tmpEDIDMfg, tmpMfg
dim Char1, Char2, Char3
Dim Byte1, Byte2
Char1=0 : Char2=0 : Char3=0
Byte1=asc(left(tmpEDIDMfg,1)) 'get the first half of the string
Byte2=asc(right(tmpEDIDMfg,1)) 'get the first half of the string
'now shift the bits
'shift the 64 bit to the 16 bit
If (Byte1 and 64) > 0 then Char1=Char1+16
'shift the 32 bit to the 8 bit
If (Byte1 and 32) > 0 then Char1=Char1+8
If (Byte1 and 16) > 0 then Char1=Char1+4
If (Byte1 and 8) > 0 then Char1=Char1+2
If (Byte1 and 4) > 0 then Char1=Char1+1

'the 2nd character uses the 2 bit and the 1 bit of the 1st byte
If (Byte1 and 2) > 0 then Char2=Char2+16
If (Byte1 and 1) > 0 then Char2=Char2+8
'and the 128,64 and 32 bits of the 2nd byte
If (Byte2 and 128) > 0 then Char2=Char2+4
If (Byte2 and 64) > 0 then Char2=Char2+2
If (Byte2 and 32) > 0 then Char2=Char2+1

'the bits for the 3rd character don't need shifting
'we can use them as they are
Char3=Char3+(Byte2 and 16)
Char3=Char3+(Byte2 and 8)
Char3=Char3+(Byte2 and 4)
Char3=Char3+(Byte2 and 2)
Char3=Char3+(Byte2 and 1)
tmpmfg=chr(Char1+64) & chr(Char2+64) & chr(Char3+64)

'Next get the device id
'the device id is 2bytes starting at EDID offset &H0a
'the bytes are in reverse order.
'this code is not text. it is just a 2 byte code assigned
'by the manufacturer. they should be unique to a model
Dim tmpEDIDDev1, tmpEDIDDev2, tmpDev

If len(tmpEDIDDev1)=1 then tmpEDIDDev1="0" & tmpEDIDDev1
If len(tmpEDIDDev2)=1 then tmpEDIDDev2="0" & tmpEDIDDev2
tmpdev=tmpEDIDDev2 & tmpEDIDDev1

'finally store all the values into the array
'Kaplan adds code to avoid duplication...

If Not InArray(tmpser,arrMonitorInfo,3) Then
End If
End If

'For now just a simple screen print will suffice for output.
'But you could take this output and write it to a database or a file
'and in that way use it for asset management.
i = 0
for tmpctr = 0 to intMonitorCount-1
If arrMonitorInfo(tmpctr,1) <> "" And arrMonitorInfo(tmpctr,0) <> "PNP" Then
If batch Then
EchoAndLog strComputer & "," & arrMonitorInfo(tmpctr,4) & "," & _
arrMonitorInfo(tmpctr,3)& "," & arrMonitorInfo(tmpctr,0) & "," & _
message = message &"Monitor " & chr(i+65) & "),"  & _
"Model Name: " & arrMonitorInfo(tmpctr,4)&","  & _
"Serial Number: " & arrMonitorInfo(tmpctr,3)&"," & _
"VESA Manufacturer ID: " & arrMonitorInfo(tmpctr,0)&","  & _
"Manufacture Date: " & arrMonitorInfo(tmpctr,2)  & VbCrLf
'wscript.echo ".........." & "Device ID: " & arrMonitorInfo(tmpctr,1)
'wscript.echo ".........." & "EDID Version: " & arrMonitorInfo(tmpctr,5)
i = i + 1
End If
End If

If not batch Then
'MsgBox message, vbInformation + vbOKOnly,strComputer & " Monitor Info"
 objFile.WriteLine "    " & message
End If

Function InArray(strValue,List,Col)
Dim i
For i = 0 to UBound(List)
If List(i,col) = cstr(strValue) Then
InArray = True
Exit Function
End If
InArray = False
End Function

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The ouput I get looks like this:
Monitor A)
Model Name: SMB2240W
Serial Number: HVNB100003
VESA Manufacturer ID: SAM
Manufacture Date: 1/2011

Monitor B)
Model Name: SMB2240W
Serial Number: HVNB100002
VESA Manufacturer ID: SAM
Manufacture Date: 1/2011

Monitor C)
Model Name: Internal LCD
Serial Number: Not Found
VESA Manufacturer ID: TOS
Manufacture Date: 4/2006