private void SplitFile(Office.SplitFileParameters splParams)
{
SetControlsEnabled(false);
manager = new Office.SplitManager(mnuUseMultiThreads.Checked);
manager.ProgressChanged += Manager_ProgressChanged;
manager.SpliterCompleted += Manager_SpliterCompleted;
groupBox4.Enabled = true;
this.PrevFinishedParameters = null;
TaskbarManager.Instance.SetProgressState(TaskbarProgressBarState.Normal, Handle);
TaskbarManager.Instance.SetProgressValue(0, 100, Handle);
manager.StartSplit(splParams);
}