Get current locale of a thread in another Windows process

Question

Is it possible to get current locale of a thread living inside another Windows process? Is there a utility that shows this or maybe a Win32 API call?

Answer 1

The locale is stored in the TEB , so you would have to be able to open the process with PROCESS_VM_READ rights and the thread with THREAD_QUERY_INFORMATION and then call OpenThread()+ NtQueryInformationThread ( ThreadBasicInformation ) and then get the TEB address in THREAD_BASIC_INFORMATION and read it with ReadProcessMemory().

All of this is undocumented and could change at any time, you also need to handle WOW64 etc...

Answer 2

There's no API call for this. Assuming that you can't modify the target app to provide the information on demand, the only solution I can see is a global hook. This allows you to inject your code into the thread in question.