Re: COM and VB
Zf <Zf@discussions.microsoft.com> wrote:
I have a COM server used by a VB Client. They were developed by VC97
and VB5. In the COM, the function called in VB will create a new
thread to do a lengthy work, and it does not wait the thread to
return, and uses a loop in VB to test if the thread returns. In VC97
and VB5, the function did not marshal the interface before passing it
to the thread. This is problematic. Now, we are moving the code to
VC2005 and VB6, and marshal the interface in the function before
passing it to the thread. After made these changes, I noticed that
the VB loop is blocked once the work in the thread starts. Because we
use the VB loop to dispatch the events and update progress, the block
causes the GUI refresh problem. Do you guys know how to resolve this
problem?
What is this interface you are talking about? Who's implementing it -
C++ side or VB side? What's the threading model of the component behind
that interface? What is the worker thread using it for?
--
With best wishes,
Igor Tandetnik
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necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925
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