getting events into c# app from a COM control - critical path help needed!

D

dave

Hi, I have a COM control / server I'm trying to get events from in my c#
applications.

1) I'm trying to get events in both c# console apps and in c# winform apps.
2) I can call methods on the COM control / server ok, I just don't receive
any events. The method calls are definitely successful.
3) I have got events and communicated ok with other COM controls from c# -
it's just this one I have a problem with.
4) I can communicate perfectly with the COM control / server from VB and
VC6 - both methods and events work fine.
5) I've tried STA and MTA and have used the control directly and via
tlbimp.exe

It looks like there is a problem with this particular control - is that
possible? I've tried sinking the events via delagates:
objControl.OnDisable += new IControlEvents_OnDisableEventHandler(OnDisable);
objControl.OnEnable += new IControlEvents_OnEnableEventHandler(OnEnable);

and by setting up an event sink:
// Create the object.
ControlProxy objControlProxy = new ControlProxyClass();

// Fix the connection points to fire events.
m_objIConnectionPointContainer =
(UCOMIConnectionPointContainer)objControlProxy;
Guid objGuid = typeof(eventtlbnsp.IControlEvents).GUID;
m_objIConnectionPointContainer.FindConnectionPoint(ref objGuid, out
m_objIConnectionPoint);
m_objIConnectionPoint.Advise(this, out m_nCookie);

Any help is SINCERELY appreciated, I'm really on the critical path on this.
I've looked all over the ng's - people have been asking about this for years
but I can't find any answers which work on this.

Cheers, Dave.
 
D

Dmitriy Lapshin [C# / .NET MVP]

Hi Dave,

Delegates are usually the way to go, they work fine for me. You can examine
the interop assembly with ildasm to see whether event arguments were
generated correctly.
 
D

dave

They don't work on this I'm afriad.

I think something dodgy is going on inside the control that is incompatible
with the CLR. My VB6 project (which just creates the control and receives
the events - 5 lines of programming) works perfectly, but when I convert it
to VB.Net, it stops working and behaves just like the c# project.

If I create a VB6 control (exe or dll) that wraps the 3rd party control (ie,
feeds method calls straight through, sends events straight out), and use the
VB6 control from c#, it works perfectly. Once I've got some time, I'll write
a VC++ wrapper.


Dmitriy Lapshin said:
Hi Dave,

Delegates are usually the way to go, they work fine for me. You can examine
the interop assembly with ildasm to see whether event arguments were
generated correctly.

--
Sincerely,
Dmitriy Lapshin [C# / .NET MVP]
Bring the power of unit testing to the VS .NET IDE today!
http://www.x-unity.net/teststudio.aspx

dave said:
Hi, I have a COM control / server I'm trying to get events from in my c#
applications.

1) I'm trying to get events in both c# console apps and in c# winform
apps.
2) I can call methods on the COM control / server ok, I just don't receive
any events. The method calls are definitely successful.
3) I have got events and communicated ok with other COM controls from c# -
it's just this one I have a problem with.
4) I can communicate perfectly with the COM control / server from VB and
VC6 - both methods and events work fine.
5) I've tried STA and MTA and have used the control directly and via
tlbimp.exe

It looks like there is a problem with this particular control - is that
possible? I've tried sinking the events via delagates:
objControl.OnDisable += new
IControlEvents_OnDisableEventHandler(OnDisable);
objControl.OnEnable += new IControlEvents_OnEnableEventHandler(OnEnable);

and by setting up an event sink:
// Create the object.
ControlProxy objControlProxy = new ControlProxyClass();

// Fix the connection points to fire events.
m_objIConnectionPointContainer =
(UCOMIConnectionPointContainer)objControlProxy;
Guid objGuid = typeof(eventtlbnsp.IControlEvents).GUID;
m_objIConnectionPointContainer.FindConnectionPoint(ref objGuid, out
m_objIConnectionPoint);
m_objIConnectionPoint.Advise(this, out m_nCookie);

Any help is SINCERELY appreciated, I'm really on the critical path on
this.
I've looked all over the ng's - people have been asking about this for
years
but I can't find any answers which work on this.

Cheers, Dave.
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