c++ - Usage limitations during the DllMain Attach and Detach process

Question

One colleague of mine has troubles during the DllMain Detach process. His bug seems not to appear in all cases, but fairly often.

While trying to help him, I kind of remembered of some usage limitations during the DllMain Attach and Detach process, but I am not sure I remember well since it was 2 year old technical discussions and it was not me working on thoses termination issues.

Namely I kind of remember that we should:

• Avoid using new and delete operator and prefer HGLOBAL memory allocation
• Avoid dealing with thread terminations here.

Could you correct me if I am wrong, explain me if ever, or point to a technical article that would deal with these issues.

Answer 1

Avoid calling LoadLibrary and related APIs.

In addition to Steve's link, here are some good relevant posts from Raymond Chen's The Old New Thing:

• https://devblogs.microsoft.com/oldnewthing/20040127-00/?p=40873
• https://devblogs.microsoft.com/oldnewthing/20040128-00/?p=40853
• https://devblogs.microsoft.com/oldnewthing/20070904-00/?p=25283
• https://devblogs.microsoft.com/oldnewthing/20100115-00/?p=15253