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MSComm Control won't work with code called from a module.

Posted on 2004-04-16
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Last Modified: 2008-03-03
Greetings,

I have an inventory control application that triggers the opening of mechanical drawers via the serial port.  Using MSComm works great, as long as the code below is embedded as a subroutine behind the calling form.  However, I would like to put this code into a module function, as it will be called from multiple locations within the application.

When I try the code below in a module, I get the following error:   "Run-Time Error 424 . . .  Object Required"

Any help would be appreciated.

Thank you in advance,

Keith

--------------------------------
CODE
--------------------------------

Function OpenDrawer()
   
    myDrawer = Forms!frmSelectQty.txtDrawer
   
' Initialize Com Port Parameters

    MSComm1.CommPort = 1
    MSComm1.Settings = "9600,N,8,1"
    MSComm1.InputLen = 1
    MSComm1.PortOpen = True
    MSComm1.HandShaking = 2

' Check to see if Drawer is already open

    If MSComm1.CTSHolding Then
       GoTo OpenMe
    Else
       MsgBox "The Drawer is Currently Open.  You must close the open drawer to continue.", vbCritical
       Exit Function
    End If
   
' Send String to Drawer to Open

OpenMe:
 
    myTrigger = Chr$(myDrawer)
    MSComm1.Output = myTrigger
    MSComm1.PortOpen = False

End Function
0
Comment
Question by:kdwood
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4 Comments
 
LVL 8

Expert Comment

by:arcross
ID: 10841748
in the module...

Public Sub TEst()

Dim MyComm as MsCOmm

' Here refrence the form where you have dragged the control
Set MyComm = Forms.YourFormName.MsCommName.Object
...


Álvaro


0
 
LVL 8

Expert Comment

by:arcross
ID: 10841802
Function OpenDrawer()

Dim MyComm as MSComm
Set MyComm = Forms!frmSelectQty.MsComm1.Object    ' Asuuming in this form you have the MsCOmm contrl
   

 myDrawer = Forms!frmSelectQty.txtDrawer
   
' Initialize Com Port Parameters

    MSComm1.CommPort = 1
    MSComm1.Settings = "9600,N,8,1"
    MSComm1.InputLen = 1
    MSComm1.PortOpen = True
    MSComm1.HandShaking = 2
0
 
LVL 8

Accepted Solution

by:
arcross earned 1000 total points
ID: 10841809
Then, substitute

MyComm.CommPort = 1
    MYComm.Settings = "9600,N,8,1"
    MyComm.InputLen = 1
    MyComm.PortOpen = True
    MyComm.HandShaking = 2
0
 
LVL 10

Author Comment

by:kdwood
ID: 10842221
arcross,

Your suggestion worked perfectly.   Thank you for the quick response.


Regards,

Keith
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