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Get monitor info while computer is open

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I'm creating a new script to determine if computers are staying with same monitors.

I've founded a script which gets information about monitors serial number and name from registry with edid.


it only works when i restart my pc after changing monitors. (because registry doesn't get refreshed when computer is open.)


I need to get active monitor's serial number. without restarting comp.

i was thinking to get all devices name from device manager. but i don't know how to do that. also i don't know how to get monitors serial number from device manager.

sorry if i couldn't explained it clearly. please ask any questions about my problems.

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A brief search on Google ("wmi" & "monitor") gives all the info you need..

Good Luck,


Edit: a forum search also turns up many examples...

Edited by kylomas

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if you can give me some of the links i can tell you if they are the one i'm looking for or not.

but the results from "wmi" "montior" query didn't gave me what i'm looking for.

also if there is a way for getting all active device names / serial numbers to a txt file it would be good to.

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You could try calling EnvUpdate ( ) a few times maybe with some Sleep() in between before checking the registry value.

Might be a quick and dirty fix.

Thank you for your answer. i will try it when i get a chance.

i'm still trying to get all device names and/or serial numbers without opening and reading it from device manager. which is a bad solution.

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  • 1 month later...

I also struggled with using the registry to get the monitor information because as you point out this isn't updated when a new monitor is added/removed only on first PC boot.

Came across a way using WMI that works and I don't believe has been posted in the forum.


Func _MonitorInfo()
Local $WMIWmiMonitorID
Local $sManufacturerName, $sSerialNumberID, $YearOfManufacture, $WeekOfManufacture, $sUserFriendlyName
Local $i
Local $sMonitorInfo
Local $strcomputer = "."
Local $objWMIServiceWMI = ObjGet("winmgmts:" & "{impersonationLevel=impersonate}!\\" & $strcomputer & "\root\WMI")
If IsObj($objWMIServiceWMI) = 1 Then
  $WMIWmiMonitorID = $objWMIServiceWMI.ExecQuery("SELECT * FROM WmiMonitorID WHERE Active='True'")
  For $objComputer In $WMIWmiMonitorID
   $WeekOfManufacture = $objComputer.WeekOfManufacture
   $YearOfManufacture = $objComputer.YearOfManufacture
   For $i = 0 To UBound($objComputer.UserFriendlyName) - 1
    $sUserFriendlyName = $objComputer.UserFriendlyName($i)
    If StringLen($sUserFriendlyName) <> 0 Then
     $sMonitorInfo = $sMonitorInfo & String(Chr($sUserFriendlyName))
   $sMonitorInfo = $sMonitorInfo & " Manufacturer: "
   For $i = 0 To UBound($objComputer.ManufacturerName) - 1
    $sManufacturerName = $objComputer.ManufacturerName($i)
    If StringLen($sManufacturerName) <> 0 Then
     ;Returns a character corresponding to an ASCII code.
     $sMonitorInfo = $sMonitorInfo & String(Chr($sManufacturerName))
   $sMonitorInfo = $sMonitorInfo & " ProductCode: "
   For $i = 0 To UBound($objComputer.ProductCodeID) - 1
    $sProductCodeID = $objComputer.ProductCodeID($i)
    If StringLen($sProductCodeID) <> 0 Then
     $sMonitorInfo = $sMonitorInfo & String(Chr($sProductCodeID))
   $sMonitorInfo = $sMonitorInfo & " Serial: "
   For $i = 0 To UBound($objComputer.SerialNumberID) - 1
    $sSerialNumberID = $objComputer.SerialNumberID($i)
    If StringLen($sSerialNumberID) <> 0 Then
     $sMonitorInfo = $sMonitorInfo & String(Chr($sSerialNumberID))
   $sMonitorInfo = $sMonitorInfo & " Built: " & $WeekOfManufacture & "/" & $YearOfManufacture
   $sMonitorInfo = $sMonitorInfo & @CRLF
  $sMonitorInfo = "Error: Not an Object" & @CRLF
Return $sMonitorInfo
EndFunc   ;==>_MonitorInfo
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