/// <summary>
/// Gets the parent process of a specified process.
/// </summary>
/// <param name="handle">The process handle.</param>
/// <returns>An instance of the Process class.</returns>
public static Process GetParentProcess(IntPtr handle)
{
ProcessInformation pi = new ProcessInformation();
int returnLength;
int status = NtQueryInformationProcess(handle, 0, ref pi, Marshal.SizeOf(pi), out returnLength);
if (status != 0)
{
throw new Win32Exception(status);
}
try
{
return Process.GetProcessById(pi.InheritedFromUniqueProcessId.ToInt32());
}
catch (ArgumentException)
{
// not found
return null;
}
}
private static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass,
ref ProcessInformation processInformation, int processInformationLength, out int returnLength);
