determine the status when using MSCOMM32 ocx to open/close a drawer

Hello All,
I'm using  MSCOMM32 ocx to be able to open a drawer.Refer to my Code..
Everything works fine.
But now I'm trying to display a message like
"Drawer is already open"
when trying to open the drawer when it is already open...
The drawer can be opened only by my application, and it is being closed manually..
When closed, nothing changes in the status of the port...that is why I'm not being able to check for the status if it is open or closed.
One solution is to close the drawer by the application itself and set a global variable as the status of the drawer...but this not being accepted by my users since according to them.
Its a bit complicated here I know...But does anyone have any idea how can I achieve this..

Private Sub Command1_Click()
    Dim output(5) As Byte
    output(1) = 27
    output(2) = 112
    output(3) = 0
    output(4) = 50
    output(5) = 250
    MSComm1.output = output
    End Sub

Private Sub Form_Load()
   ' Use COM1.
   MSComm1.CommPort = 1
   ' 9600 baud, no parity, 8 data, and 1 stop bit.
   MSComm1.Settings = "9600,N,8,1"
   ' Tell the control to read entire buffer when Input
   ' is used.
   MSComm1.InputLen = 0
   ' Open the port.
   MSComm1.PortOpen = True
   End Sub

Private Sub Form_Unload(Cancel As Integer)
   ' Close the serial port.
   MSComm1.PortOpen = False
End Sub

Regards,
Priya