Things you shouldn't do, part 2: Dll's can't ever call CoInitialize* on the application's thread.

re: Things you shouldn't do, part 2: Dll's can't ever call CoInitialize* on the application's thread.

Junfeng Zhang — Wed, 12 May 2004 18:16:00 GMT

The not so great news is PostQueuedCompletionStatus is NT only. QueueUserAPC is available in 9x though.

re: Things you shouldn't do, part 2: Dll's can't ever call CoInitialize* on the application's thread.

Catatonic — Thu, 13 May 2004 00:28:00 GMT

Great article. I recently came across a DLL that called CoInitialize, and this caused my DLL (a COM component) to fail. Luckily I had the source code to this DLL. I'm not sure what could be done without the source.

re: Things you shouldn't do, part 2: Dll's can't ever call CoInitialize* on the application's thread.

Larry Osterman — Thu, 13 May 2004 02:36:00 GMT

Yech. Please tell me that that DLL wasn't part of a shipping system :).

And if it was, that it wasn't from a Microsoft product :)

re: Things you shouldn't do, part 2: Dll's can't ever call CoInitialize* on the application's thread.

Catatonic — Thu, 13 May 2004 10:09:00 GMT

Definitely not a shipping system. The DLL was a project from CodeProject.com. So basically it was sample code. It did work perfectly apart from the CoInit/UnInit though.

re: Things you shouldn't do, part 2: Dll's can't ever call CoInitialize* on the application's thread.

Larry Osterman — Thu, 13 May 2004 14:12:00 GMT

That's a relief. Now the problem is: How do you fix it? Any clients that successfully use this module depend on it's calling CoInitialize/CoUninitialize. 'Tis a puzzlement.

In your case you can just rename your private version of the DLL. But what if it had shipped?

re: Don't use vbscript/jscript to write your custom actions!

Aaron Stebner's WebLog — Mon, 28 Feb 2005 03:38:00 GMT

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