function ExecuteProcess(FileName: string; Visibility: Integer; BitMask: Integer; Synch: Boolean): Longword;
//valori di Visibility:
{
Value Meaning
SW_HIDE :Hides the window and activates another window.
SW_MAXIMIZE :Maximizes the specified window.
SW_MINIMIZE :Minimizes the specified window and activates the next top-level window in the Z order.
SW_RESTORE :Activates and displays the window. If the window is minimized or maximized,
  Windows restores it to its original size and position. An application should
  specify this flag when restoring a minimized window.
SW_SHOW :Activates the window and displays it in its current size and position.
SW_SHOWDEFAULT :Sets the show state based on the SW_ flag specified in the STARTUPINFO
  structure passed to the CreateProcess function by the program that started the application.
SW_SHOWMAXIMIZED :Activates the window and displays it as a maximized window.
SW_SHOWMINIMIZED :Activates the window and displays it as a minimized window.
SW_SHOWMINNOACTIVE :Displays the window as a minimized window. The active window remains active.
SW_SHOWNA :Displays the window in its current state. The active window remains active.
SW_SHOWNOACTIVATE :Displays a window in its most recent size and position. The active window remains active.
SW_SHOWNORMAL :Activates and displays a window. If the window is minimized or maximized,
  Windows restores it to its original size and position. An application should specify this
  flag when displaying the window for the first time.
}
//FileName: the name of the program I want to launch
//Bitmask: specifies the set of CPUs on wich I want to run the program
  //the BitMask is built in the following manner:
  //I have a bit sequence: every bit is associated to a CPU (from right to left)
  //I set the bit to 1 if I want to use the corrisponding CPU, 0 otherwise
  //for example: I have 4 processor and I want to run the specified process on the CPU 2 and 4:
  //the corresponding bitmask will be 1010 -->2^0 * 0 + 2^1 * 1 + 2^2 * 0 + 2^3 * 1 = 2 + 8 = 10
  //hence BitMask = 10
//Synch: Boolean --> True if I want a Synchronous Execution (I cannot close
//my application before the launched process is terminated)
var
 zAppName: array[0..512] of Char;
 zCurDir: array[0..255] of Char;
 WorkDir: string;
 StartupInfo: TStartupInfo;
 ProcessInfo: TProcessInformation;
 Closed: Boolean;
begin
 Closed := True;
 StrPCopy(zAppName, FileName);
 GetDir(0, WorkDir);
 StrPCopy(zCurDir, WorkDir);
 FillChar(StartupInfo, SizeOf(StartupInfo), #0);
 StartupInfo.cb := SizeOf(StartupInfo);
 StartupInfo.dwFlags := STARTF_USESHOWWINDOW;
 StartupInfo.wShowWindow := Visibility;
 if not CreateProcess(nil,
  zAppName, // pointer to command line string
  nil, // pointer to process security attributes
  nil, // pointer to thread security attributes
  False, // handle inheritance flag
  CREATE_NEW_CONSOLE or // creation flags
  NORMAL_PRIORITY_CLASS,
  nil, //pointer to new environment block
  nil, // pointer to current directory name
  StartupInfo, // pointer to STARTUPINFO
  ProcessInfo) // pointer to PROCESS_INF
  then Result := WAIT_FAILED
 else
 begin
  //running the process on the set of CPUs specified by BitMask
  SetProcessAffinityMask(ProcessInfo.hProcess, BitMask);
  /////
  if (Synch = True) then //if I want a Synchronous execution (I cannot close my
  // application before this process is terminated)
  begin
  Closed:= False;
  repeat
  case WaitForSingleObject(
  ProcessInfo.hProcess, 100) of
  WAIT_OBJECT_0 : Closed:= True;
  WAIT_FAILED : RaiseLastWin32Error;
  end;
  Application.ProcessMessages;
  until (Closed);
  GetExitCodeProcess(ProcessInfo.hProcess, Result);
  //exit code of the launched process (0 if the process returned no error )
  CloseHandle(ProcessInfo.hProcess);
  CloseHandle(ProcessInfo.hThread);
  end
  else
  begin
  Result := 0;
  end;
 end;
end; {ExecuteProcess}
// Open Taskmanager, select the launched process, right click,
// "Set affinity", you will see a check on the CPUs you selected