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create an ActiveXEXE to get input from a device through serial comm?

Posted on 2003-02-24
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Last Modified: 2011-09-20
Hi, i wanna create an activeXEXE to get input from a device through serial comm port?
I mean,I'll be always to fact serial comm programmin. get data from same device. So, i don't need to write again the coding for that. you may be ask "why do you have to crate an activeXEXE? why not an activeXDLL?"
that answer is because my application (main application) has a routine task on every second. that it'll not disturb the routine.
actually, i have created what i excatly wanted, but i couldn't fire my event in the mssomm1_event (recieve event). it could open/close port, just couldn't get input from device.

oh ya, I have PCI communication Port installed to my computer (Port 5 and 6). but when i scanned using mscomm i just got 2 default comm port (1 and 2). My pci comm port is RS485.
does mscomm has limited to 4 ports (1,2,3,4) ?

Please help me to solve this problem..

thanks..

Liung012
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Question by:liung012
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4 Comments
 

Expert Comment

by:eamonk
ID: 8016121
Hi,
The mscomm control supports comm ports 1 up to 16.

You could try calling:
Setting the MS Comm Control CommPort Property to 4 (and next 5).
Call the PortOpen method of the MS Comm Control.
If the PortOpen is True then MSComm can access the Port, if false there is a problem.

I have included some sample code:

For i = 0 To 6
        MSComm1.CommPort = i
        MSComm1.PortOpen = True
       
        If Not MSComm1.PortOpen Then
            str = "Comm Port " & i & " is unavailable."
            lstUnavailable.AddItem str
            lstUnavailable.AddItem Err.Description
        Else
            str = "Comm Port " & i & " is available."
            lstAvailable.AddItem str
        End If
        Me.Refresh
        Err.Clear
        MSComm1.PortOpen = False
 Next i

EamonK.
   
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Expert Comment

by:CleanupPing
ID: 8901218
liung012:
This old question needs to be finalized -- accept an answer, split points, or get a refund.  For information on your options, please click here-> http:/help/closing.jsp#1 
Experts: Post your closing recommendations!  Who deserves points here?
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Expert Comment

by:DanRollins
ID: 8972579
liung012, an EE Moderator will handle this for you.
Moderator, my recommended disposition is:

    Save as PAQ -- No Refund.

DanRollins -- EE database cleanup volunteer
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