How to write a code using visual basic 6 to detect serial port connected or disconnected?

Question

I am new to visual basic 6 and I would like to write a code that can detect if serial port com1 is connected then the application will automatically close.

Thanks and appreciated your help!

Do you have some code you can show us? – Pieter Jan 15 '18 at 07:03 — Pieter, Jan 15 '18 at 07:03
Your question says VB6. Your tag says VBA. Which is it? – YowE3K Jan 15 '18 at 07:36 — YowE3K, Jan 15 '18 at 07:36

score 0 · Accepted Answer · answered Jan 15 '18 at 07:54

First of all, like it's already said in the comments, you surely mean VB6 and not VBA.

Without any code it's difficult to give you a good answer. But I will try..

There is a MSComm Control in VB6 which is useful for serial communication. You can check the property 'PortOpen'

MSComm1.CommPort = 1
If MSComm1.PortOpen = False Then
    Unload Me
End If

For further information check this question:

Problems opening and closing the mscomm port in vb6 when interfacing microcontroller

and see this documentation:

https://msdn.microsoft.com/en-us/library/aa259393(v=vs.60).aspx

How to write a code using visual basic 6 to detect serial port connected or disconnected?

1 Answers1