/// <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)
{
var pbi = new ParentProcessUtilities();
int returnLength;
int status = NtQueryInformationProcess(handle, 0, ref pbi, Marshal.SizeOf(pbi), out returnLength);
if (status != 0)
throw new Win32Exception(status);
try
{
return Process.GetProcessById(pbi.InheritedFromUniqueProcessId.ToInt32());
}
catch (ArgumentException)
{
// not found
return null;
}
}
private static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass,
ref ParentProcessUtilities processInformation,
int processInformationLength, out int returnLength);