SleepEx function Null safety
Suspends the current thread until the specified condition is met. Execution resumes when one of the following occurs: (i) an I/O completion callback function is called; (ii) an asynchronous procedure call (APC) is queued to the thread; (iii) the time-out interval elapses.
DWORD SleepEx( DWORD dwMilliseconds, BOOL bAlertable );
int SleepEx(int dwMilliseconds, int bAlertable) => _SleepEx(dwMilliseconds, bAlertable);