public static int GetParentProcessId()
{
var pbi = new PROCESS_BASIC_INFORMATION();
//Get a handle to our own process
IntPtr hProc = OpenProcess((ProcessAccess)0x001F0FFF, false, Process.GetCurrentProcess().Id);
try {
int sizeInfoReturned;
int queryStatus = NtQueryInformationProcess(hProc, (PROCESSINFOCLASS)0, ref pbi, pbi.Size, out sizeInfoReturned);
} finally {
if (!hProc.Equals(IntPtr.Zero)) {
//Close handle and free allocated memory
CloseHandle(hProc);
hProc = IntPtr.Zero;
}
}
return (int)pbi.InheritedFromUniqueProcessId;
}
public static extern int NtQueryInformationProcess(IntPtr hProcess, PROCESSINFOCLASS pic, ref PROCESS_BASIC_INFORMATION pbi, int cb, out int pSize);
public static extern int NtQueryInformationProcess(IntPtr hProcess, PROCESSINFOCLASS pic, ref PROCESS_BASIC_INFORMATION pbi, int cb, out int pSize);