wmi Using WMI in VBScript Executing a WMI Method

Example

Some WMI Classes expose Methods that allow you to do something with that object. For example, the Win32_Printer class has 11 methods for interacting with a printer, one of which is the PrintTestPage method. The following code demonstrates how to select a specific printer and print a test page.

'Specify the name of the target computer
strComputer = "."
'Note: Backslash is a special character that must be escaped with a backslash
'This means the UNC \\Network\Path\PrinterName must be written like the following
strQuery = "SELECT * FROM Win32_Printer WHERE DeviceID='\\\\Network\\Path\\PrinterName'"

Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\ROOT\cimv2")
Set colItems = objWMIService.ExecQuery(strQuery)

'ExecQuery returns a collection object, even when there's only 1 item in the collection
For Each objItem In colItems
    'The PrintTestPage method takes no parameters and returns a UINT32
    intTestPageReturnCode = objItem.PrintTestPage
Next
'PrintTestPage will return 0 (Successs) or 5 (Failure)
Select Case intTestPageReturnCode
    Case 0
        WScript.StdOut.WriteLine "Test page successfully printed"
    Case 5
        WScript.StdOut.WriteLine "Test page printing failed"
    Case Else
        WScript.StdOut.WriteLine "An unknown error occurred while printing a test page"
End Select