I'm not sure I understand your question... I have no memory leaks and I see the memory usage increasing at every new created thread. So I presume that the "per-thread" heap memory is not released by the call to FreeLibrary().

My code looks like this:

int CMainClass::Start()
{
.......
for(int = 0; iGetList(); // I need a method in the CMainClass
return 0;
}
........
int CMainClass::GetList()
{
HINSTANCE hLibrary = LoadLibrary(L"winhttp.dll");
........
// Call some winhttp.dll functions.
........
FreeLibrary(hLibrary);
return 0;
}

My problem is that despite the call to FreeLibrary(), winhttp.dll is not unloaded. Each new thread I create allocate memory in the heap, but the call to FreeLibrary() does not release that memory. Is there a way to force the unloading of the library and the release of the memory? Thank you!