hi list,

the sdk of a program i am writing a plugin for says:

" The dll project implementing the COM object must implement and export the
DllCanUnloadNow function in order to be freed by UnloadCOMLibs. See your
compiler documentation for more details about DllCanUnloadNow. "

is it possible to export "DllCanUnloadNow" from a vb.net class library and
if yes - how would i do this ?

thank you

Ralf Hoelzemer

Ralf,
> is it possible to export "DllCanUnloadNow" from a vb.net class library and
> if yes - how would i do this ?
No it is not possible.

I would expect that one of the Framework DLLs already do this for you, as
when you are exposing COM types from .NET the framework is doing most of the
work converting the .NET types into COM types.

Hope this helps
Jay

"Ralf Hoelzemer" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> hi list,
>
> the sdk of a program i am writing a plugin for says:
>
> " The dll project implementing the COM object must implement and export
the
> DllCanUnloadNow function in order to be freed by UnloadCOMLibs. See your
> compiler documentation for more details about DllCanUnloadNow. "
>
> is it possible to export "DllCanUnloadNow" from a vb.net class library and
> if yes - how would i do this ?
>
> thank you
>
> Ralf Hoelzemer
>
>
>

ok,
thank you for your reply, Jay.
After a while of testing it seems true that the framework is handling this
command
internally, but after calling the command "UnloadAllCOMLibs" from within the
program all of my COM-References are gone and if i try to re-reference them
VS.NET tells me that it cannot do this because another program is accessing
these
files ath the moment.
Any suggestions ?

Ralf


> Ralf,
> > is it possible to export "DllCanUnloadNow" from a vb.net class library
and
> > if yes - how would i do this ?
> No it is not possible.
>
> I would expect that one of the Framework DLLs already do this for you, as
> when you are exposing COM types from .NET the framework is doing most of
the
> work converting the .NET types into COM types.
>
> Hope this helps
> Jay

Ralf,
You may want to ask this "down the hall" in the
microsoft.public.dotnet.framework.interop newsgroups as that is where the
COM interop experts tend to hang out.

Hope this helps
Jay

"Ralf Hoelzemer" <(E-Mail Removed)> wrote in message
news:%23UMIa%23$(E-Mail Removed)...
> ok,
> thank you for your reply, Jay.
> After a while of testing it seems true that the framework is handling this
> command
> internally, but after calling the command "UnloadAllCOMLibs" from within
the
> program all of my COM-References are gone and if i try to re-reference
them
> VS.NET tells me that it cannot do this because another program is
accessing
> these
> files ath the moment.
> Any suggestions ?
>
> Ralf
>
>
> > Ralf,
> > > is it possible to export "DllCanUnloadNow" from a vb.net class library
> and
> > > if yes - how would i do this ?
> > No it is not possible.
> >
> > I would expect that one of the Framework DLLs already do this for you,
as
> > when you are exposing COM types from .NET the framework is doing most of
> the
> > work converting the .NET types into COM types.
> >
> > Hope this helps
> > Jay
>
>

ok,
then i will give it a shot!
thank you for your answers

Ralf

"Jay B. Harlow [MVP - Outlook]" <(E-Mail Removed)> schrieb im
Newsbeitrag news:%(E-Mail Removed)...
> Ralf,
> You may want to ask this "down the hall" in the
> microsoft.public.dotnet.framework.interop newsgroups as that is where the
> COM interop experts tend to hang out.
>
> Hope this helps
> Jay
>
> "Ralf Hoelzemer" <(E-Mail Removed)> wrote in message
> news:%23UMIa%23$(E-Mail Removed)...
> > ok,
> > thank you for your reply, Jay.
> > After a while of testing it seems true that the framework is handling
this
> > command
> > internally, but after calling the command "UnloadAllCOMLibs" from within
> the
> > program all of my COM-References are gone and if i try to re-reference
> them
> > VS.NET tells me that it cannot do this because another program is
> accessing
> > these
> > files ath the moment.
> > Any suggestions ?
> >
> > Ralf
> >
> >
> > > Ralf,
> > > > is it possible to export "DllCanUnloadNow" from a vb.net class
library
> > and
> > > > if yes - how would i do this ?
> > > No it is not possible.
> > >
> > > I would expect that one of the Framework DLLs already do this for you,
> as
> > > when you are exposing COM types from .NET the framework is doing most
of
> > the
> > > work converting the .NET types into COM types.
> > >
> > > Hope this helps
> > > Jay
> >
> >
>
>