does winapi is thread safe

[moteus]

Can i use winapi in several thread when each thread has it's own lua_Sate?
When i try use i have strange error.
On winapi.sleep i have error like 'attempt to call a string value';
I do not debug and just switch to my own library. So may be its my fault.

[stevedonovan]

I don't think winapi is thread safe - I am trying, but it is difficult to get correct ;)