strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
    & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
 
Set colInstalledPrinters =  objWMIService.ExecQuery _
    ("Select * from Win32_Printer")
 
For Each objPrinter in colInstalledPrinters
    if objPrinter.Local = True And left(objPrinter.PortName,3) =  "USB" then
        meinname = objPrinter.Name           
    end if
Next
 
Set colInstalledPrinters =  objWMIService.ExecQuery _
    ("Select * from Win32_Printer Where Name = '" & meinname &"'")
 
For Each objPrinter in colInstalledPrinters
	objPrinter.SetDefaultPrinter()
Next