'// Multi-Gig Memory Meter
'// Xander 'rabidrobot' Lih Jan 2007
'// http://feebdack.com
'// Please feel free to reuse in any form.
' Set Up Meter Refresher Object
Dim objWMIService, objRefresher, objRefreshItem
Set objWMIService = GetObject("winmgmts:root\cimv2")
Set objRefresher = CreateObject("WbemScripting.SWbemRefresher")
Set objRefreshItem = objRefresher.AddEnum(objWMIService, "Win32_PerfRawData_PerfOS_Memory").ObjectSet
objRefresher.Refresh
' Important DX-Objects
Dim dxViewbox, dxPercentText
' How often to update the meter in milliseconds.
Const REFRESH_RATE = 1000
' This is good to know - total PC RAM
Dim totalMemory
' Adjust these to fit custom graphics
Const MARG_left = 0' Margin to left of zero on meter
Const MAX_width = 150 ' Total width of bar 100% used
'Called when the script is executed
Sub Object_OnScriptEnter
' I find it handy to nickname some objects - you can easily change these here.
Set dxViewbox = DesktopX.Object("rr_RAM_Viewbox")
Set dxPercentText = DesktopX.Object("rr_RAM_Percent_Text")
' Gather total memory available information
Dim colItems, objItem
Set colItems = objWMIService.ExecQuery("Select * from Win32_ComputerSystem",,48)
totalMemory = 0
For Each objItem In colItems
totalMemory = totalMemory + objItem.TotalPhysicalMemory
Next
Set colItems = Nothing
' Start Monitor
Object.SetTimer 111, REFRESH_RATE
End Sub
Sub Object_OnTimer111
' Update information in the refresher object
objRefresher.Refresh
' The refresher is an enumeration, or list
' So we loop through it, even if it might have only one member
Dim availableMemory, objItem, percentUsed
availableMemory = 0
For Each objItem In objRefreshItem
' Gather info - I only get AvailableBytes, but you could
' get any of the info listed in the OnLButtonUp sub too.
availableMemory = availableMemory + objItem.AvailableBytes
Next
percentUsed = (totalMemory - availableMemory) / totalMemory
' Use handy nicknames
dxViewbox.width = CInt(percentUsed * MAX_width + MARG_left)
dxPercentText.Text = FormatNumber(percentUsed * 100, 0) & "%"
' Update other text objects you may have, e.g.
' DeaktopX.Object("FreeMemoryText").Text = FormatNumber(availableMemory / 1024^2, 1) & "MB Free"
End Sub
'Called when the script is terminated
Sub Object_OnScriptExit
Set objWMIService = Nothing
Set objRefresher = Nothing
Set dxViewbox = Nothing
Set dxPercentText = Nothing
End Sub
U can use this sript from Rabidrobot. 
