// In the BCL an equivalent method to this appears in the private class System.Diagnostics.NtProcessManager
private static int GetParentProcessId()
{
NtProcessBasicInfo info = new NtProcessBasicInfo();
Process process = Process.GetCurrentProcess();
int returnedSize;
HandleRef href = new HandleRef(process, process.Handle);
int result = NativeMethods.NtQueryInformationProcess(href, 0, ref info, Marshal.SizeOf(info.GetType()), out returnedSize);
if (result != 0)
{
throw new InvalidOperationException(
"Unable to retrieve the parent process id", new Win32Exception(result));
}
return((int)info.InheritedFromUniqueProcessId);
}
public static extern int NtQueryInformationProcess(SafeProcessHandle processHandle, int query, NtProcessBasicInfo info, int size, int[] returnedSize);
public static extern int NtQueryInformationProcess(
HandleRef processHandle, int query, ref NtProcessBasicInfo info, int size, out int returnedSize);
public static extern int NtQueryInformationProcess(SafeProcessHandle processHandle, int query, NtProcessBasicInfo info, int size, int[] returnedSize);