Hiding AutoCAD main window

Is there a way of keeping the main autocad window hidden? I run vba code and I'd like to keep the main window hidden. I tried to use

ACAD.Application.Visible = False

and it works, but as soo as I call something like

ACAD_DWG.SendCommand "-insert" & vbCr & ACAD_BLOCK & vbCr & "0" & "," & "0" & vbCr & vbCr & vbCr & vbCr

the main window pops to the front. I run the vba code controlling AutoCAD from excel.

Test code that I run from excel VBA:

Public Sub test()
   Dim ACAD As AcadApplication
   Dim ACAD_DWG As AcadDocument
   Set ACAD = New AcadApplication
   'window invisible
   Set ACAD_DWG = ACAD.Documents.Add
   'autocad icon appears the task bar
   ACAD_DWG.SendCommand "line" & vbCr & "0,0" & vbCr & "10,10" & vbCr & vbCr
   'main autocad window goes to the front
   On Error Resume Next
   ACAD.Quit
   Set ACAD = Nothing
End Sub

I believe, and this is just a guess here, that the reason is because you are using SendCommand. SendCommand is putting the focus onto AutoCAD. I believe that if you added your line or insert straight to the database without using SendCommand that you could keep the Application Window hidden.

Thanks! I'm dealing with blocks & attributes in the real life program, so I guess I might have to accept the reality.