/// <summary>
/// Terminate a process tree
/// </summary>
/// <param name="hProcess">The handle of the process</param>
/// <param name="processID">The ID of the process. Passed as UInt64 to make sure it works in both 32- and 64-bit environments</param>
/// <param name="exitCode">The exit code of the process</param>
public void TerminateProcessTree(IntPtr hProcess, UInt64 processID, int exitCode)
{
Process[] processes = Process.GetProcesses();
// Retrieve all processes on the system
foreach (Process p in processes)
{
try
{
// Get some basic information about the process
if (IntPtr.Size == 4)
{
// 32-bit
PROCESS_BASIC_INFORMATION_32 pbi = new PROCESS_BASIC_INFORMATION_32();
uint bytesWritten;
NtQueryInformationProcess32(p.Handle,
0, ref pbi, Marshal.SizeOf(pbi),
out bytesWritten); // == 0 is OK
// Is it a child process of the process we're trying to terminate?
if (pbi.InheritedFromUniqueProcessId == processID)
{
// The terminate the child process and its child processes
TerminateProcessTree(p.Handle, pbi.UniqueProcessId, exitCode);
}
}
else
{
// 64-bit
PROCESS_BASIC_INFORMATION_64 pbi = new PROCESS_BASIC_INFORMATION_64();
uint bytesWritten;
NtQueryInformationProcess64(p.Handle,
0, ref pbi, Marshal.SizeOf(pbi),
out bytesWritten); // == 0 is OK
// Is it a child process of the process we're trying to terminate?
if (pbi.InheritedFromUniqueProcessId == processID)
{
// The terminate the child process and its child processes
TerminateProcessTree(p.Handle, pbi.UniqueProcessId, exitCode);
}
}
}
catch (Exception /* ex */)
{
// Ignore, most likely 'Access Denied'
}
}
// Finally, termine the process itself:
TerminateProcess(hProcess, exitCode);
}
static extern int NtQueryInformationProcess64(IntPtr hProcess, int processInformationClass /* 0 */,
ref PROCESS_BASIC_INFORMATION_64 processBasicInformation, int processInformationLength, out uint returnLength);