docs: def Open(self):
      """Opens the process for reading."""
  
      self.h_process = kernel32.OpenProcess(
          PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, 0, self.pid)
      if not self.h_process:
        raise process_error.ProcessError(
            "Failed to open process (pid %d)." % self.pid)
  
      if self.Is64bit():
        si = self.GetNativeSystemInfo()
        self.max_addr = si.lpMaximumApplicationAddress
      else:
        si = self.GetSystemInfo()
        self.max_addr = 2147418111
  
      self.min_addr = si.lpMinimumApplicationAddress