Hey guys,
Bear with me if this is not the correct group where to send this question.
I'm just hoping with the ammount of activity this group has I'd be at least
be redirected to the correct place, if this is not.
I'm writing an Excel add-in (in good old C, using COM), and I always find
that a `THREAD_ATTACH' event in my DllMain always causes Excel to crash.
I'm pretty sure my code is not offending Excel at all and the reason must
be other, probably unknown trick of the trade, or something that I'm doing
worng othewise. This a log of my add-in's activity as Excel calls it:
DllMain: PROCESS_ATTACH (handle = 0xb8540000)
DllGetClassObject: Requesting:
class: {8E2406A6-392C-4C63-964E-C1D2C4B55611}
guid: {00000001-0000-0000-C000-000000000046} (IUnknown)
class_add_ref: Called. Returning 1
DllGetClassObject: about to return S_OK
class_create_instance: Requesting: {B65AD801-ABAF-11D0-BB8B-00A0C90F2744}
class_create_instance: About to return `IDTExtensibility2' @ 0xb63653e0
add_ref: Called for 0xb63653e0. Returning 1
add_ref: Called for 0xb63653e0. Returning 2
release: Called for 0xb63653e0. Returning 1
class_release: Called. Returning 0
query_interface: Requesting: {B65AD801-ABAF-11D0-BB8B-00A0C90F2744}
(0xb63653e0)
add_ref: Called for 0xb63653e0. Returning 2
class_create_instance: About to return (existing) `IDTExtensibility2' @
0xb63653e0
release: Called for 0xb63653e0. Returning 1
query_interface: Requesting: {E19C7100-9709-4DB7-9373-E7B518B47086}
(0xb63653e0)
query_interface: About to return E_NOINTERFACE
on_connection: Called. Returning S_OK
on_addins_update: Called. Returning S_OK
query_interface: Requesting: {000C033E-0000-0000-C000-000000000046}
(0xb63653e0)
query_interface: About to return `ICustomTaskPaneConsumer' @0xae54ee00
add_ref: Called for 0xae54ee00. Returning 1
ctp_available: Called. Returning S_OK
release: Called for 0xae54ee00. Freeing it and returning 0
query_interface: Requesting: {000C0396-0000-0000-C000-000000000046}
(0xb63653e0)
query_interface: About to return `IRibbonExtensibility' @ 0xae54ef10
add_ref: Called for 0xae54ef10. Returning 1
add_ref: Called for 0xae54ef10. Returning 2
add_ref: Called for 0xae54ef10. Returning 3
query_interface: Requesting: {00020400-0000-0000-C000-000000000046}
(0xae54ef10)
query_interface: About to return `IDispatch' @ 0xae54ef60
add_ref: Called for 0xae54ef60. Returning 1
release: Called for 0xae54ef10. Returning 2
release: Called for 0xae54ef10. Returning 1
add_ref: Called for 0xae54ef10. Returning 2
add_ref: Called for 0xae54ef60. Returning 2
get_custom_ui: Returning S_OK
release: Called for 0x3ed456e0. Returning 1
release: Called for 0x3ed45890. Returning 1
on_startup_complete: Called. Returning S_OK
DllMain: THREAD_ATTACH (handle = 0xb8540000)
After this THREAD_ATTACH event, which sometimes kics in sooner, sometimes
later, Excel simply crashes, but always internally way after this log has
been written to disk.
I've tried debugging with WinDBG and I can never see any of my add-in
functions' within the backtrace of any of the threads, as well as none of
the objetcs I've alloc'ed within their arguments. I'm never feeding garbabe
back (for example in GetCustomUI I zero out the returning pointer before
returning S_OK) so at this point my add-in is just a dumb one, not doing
much, but not breaking anything either (that I know).
What could be the problem? I'd really appreciate any hints or pointers, as
well as being redirected to the correct place if this is not as I said.
Thanks,
--
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