Hi

I have a vb6 application that can create multiple instances of an emulator (one for automatic data transfer from machinery and the other for manual entry).

In the GetObject function you can only supply the path or class which will be the same for both instances. The captions/title will, however be different

How can I ensure I connect to the correct instance?

Thanks in advance

Daz

Create the instances from within VB, which puts a reference to the running code in an object.

Using APIs you can "read" the titlebars of the windows (seems to me there's an API to enumerate the running appls), and get the hWnd of those windows. More work than the first suggestion though.

(BTW: using GetObject doesn't connect you to anything, it only returns a reference to the running object. You use this connection to communicate with it, but there is no connection, per se.)

Perhaps http://p2p.wrox.com/topic.asp?TOPIC_ID=11222 would be helpful...

Is your emulator written in VB6?

Using GetObject requires that the object you are getting is registered in the Running Object Table (generally referred to as the ROT). And applications written in VB6 are not added to the ROT, and therefore you CANNOT use GetObject to get a running object of a component written in VB6, or any component that does not cause itself to be entered into the ROT. You can code a VB6 app to register itself in the ROT, but it should be considered an advanced level programming task - you'll need to gather the knowledge you need and experiment a lot.

So... The question is: Is your emulator written in VB6, or in some other language? Is it an ActiveX exe or dll?


Woody Z http://www.learntoprogramnow.com

Thanks guys, I have used Brians first suggestion and keep the object alive. Just had to add a few checks in case the emulator had been destroyed outside of the VB app.

Thanks again.

Daz