MOVABLE:
　　　hItem = GetTreeCtrl().InsertItem(strDrive, ILI_FLOPPYDRV, ILI_FLOPPYDRV, hParent);
　　　AddDummyNode(hItem);
　　　break;
　　case DRIVE_FIXED:
　　　hItem = GetTreeCtrl().InsertItem(strDrive, ILI_DRIVE, ILI_DRIVE, hParent);
　　　AddDummyNode(hItem);
　　　break;
　　case DRIVE_REMOTE:
　　　hItem = GetTreeCtrl().InsertItem(strDrive, ILI_DRIVE, ILI_DRIVE, hParent);
　　　AddDummyNode(hItem);
　　　break;
　　case DRIVE_CDROM:
　　　hItem = GetTreeCtrl().InsertItem(strDrive, ILI_CDDRV, ILI_CDDRV, hParent);
　　　AddDummyNode(hItem);
　　　break;
　　case DRIVE_RAMDISK:
　　　hItem = GetTreeCtrl().InsertItem(strDrive, ILI_CDDRV, ILI_CDDRV, hParent);
　　　AddDummyNode(hItem);
　　　break;
　　default:
　　　return FALSE;
　}
　return true;
}

void CLeftView::OnDestroy()
{
　CTreeView::OnDestroy();
　// TODO: Add your message handler code here
　if(m_pImageList != NULL)
　　m_pImageList = NULL;
　　delete m_pImageList;
}

void CLeftView::AddDummyNode(HTREEITEM hItem)
{
　GetTreeCtrl().InsertItem ("", 0, 0, hItem);
}

CString CLeftView::GetPathFromItem(HTREEITEM hItem)
{
　CString strPathName;
　while (hItem != NULL)
　{
　　CString string = GetTreeCtrl().GetItemText (hItem);
　　if ((string.Right (1) != "") && !strPathName.IsEmpty ())
　　　string += "";
　　strPathName = string + strPathName;
　　hItem = GetTreeCtrl().GetParentItem (hItem);
　}
　if(strPathName.Left(11) == MYCOMPUTER && strPathName.GetLength() > 11)
　　strPathName = strPathName.Mid(12);
　return strPathName;
}

BOOL CLeftView::IsPathValid(CString &strPathName)
{
　if (strPathName.GetLength () == 3)
　　return TRUE;
　HANDLE hFind;
　WIN32_FIND_DATA fd;
　BOOL bResult = FALSE;
　if ((hFind = ::FindFirstFile ((LPCTSTR) strPathName, &fd)) !=INVALID_HANDLE_VALUE) {
　　if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
　　　bResult = TRUE;
　　　::CloseHandle (hFind);
　}
　return bResult;
}

BOOL CLeftView::IsMediaValid(CString &strPathName)
{
　// Return TRUE if the drive doesn''''t support removable media.
　UINT nDriveType = GetDriveType ((LPCTSTR) strPathName);
　if ((nDriveType != DRIVE_REMOVABLE) && (nDriveType != DRIVE_CDROM))
　　return TRUE;
}

HTREEITEM CLeftView::GetDriveNode(HTREEITEM hItem)
{
　HTREEITEM hParent;
　do {
　　hParent = GetTreeCtrl().GetParentItem (hItem);
　　if (hParent != NULL)
　　　hItem = hParent;
　} while (hParent != NULL);
　return hItem;
}

UINT CLeftView::DeleteChildren(HTREEITEM hItem)
{
　UINT nCount = 0;
　HTREEITEM hChild = GetTreeCtrl().GetChildItem (hItem);
　while (hChild != NULL) {
　　HTREEITEM hNextItem = GetTreeCtrl().GetNextSiblingItem (hChild);
　　GetTreeCtrl().DeleteItem (hChild);
　　hChild = hNextItem;
　　nCount++;
　}
　return nCount;
}

UINT CLeftView::AddDirectoryNodes(HTREEITEM hItem, CString &strPathName)
{
　HANDLE hFind;
　WIN32_FIND_DATA fd;
　UINT nCount = 0;
　CString strFileSpec = strPathName;
　if (strFileSpec.Right (1) != "")
　　strFileSpec += "";
　strFileSpec += "*.*";
　if ((hFind = ::FindFirstFi