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