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I had build a OCX to package some basic tapi function to useing it in VB or C#.

I use C# to develop my application use this OCX.
I drag this ocx (control) from toolbox and drop it into my form.
And init some property such as LineName...(I call Line1) and declare events such as Incommingcall (Event), DigitReceiced...
And then i open this line which associated with LineName property.
It run well. in this time i can get caller id, digit received which user press when line is connected...

But when i use two line in my application i mean i have two modem install in my computer.
So i drag another one ocx and drop to my form. and then init property and event for it that similar above in this case (I call Line2).

i open two line in the same time and observed by two ocx.

But when have a new incomming call the event incommingcall occur it just jump to the function which i had declare for incommingcall event of the which the first ocx which i drag and drop into the form. Although the new call is call to the secon line. I mean it must be jump to the function which i had declare for incommingcall event of the which the second ocx.

I mean every new incomming call it alway process in these function which i had declare for these event of the ocx which i firstest i had drag and drop into the form. It regardless the call is call to what line Line1 or Line2

Could some one help me

When you get an 'incoming call' event, you should check which line it came from. Re-write your OCX with some flag for 'incoming call' and check for that flag in the main application