void SortColumnsByLabel()
{
	Worksheet wks1 = Project.ActiveLayer(); // active wks
	string wksName = wks1.GetPage().GetName(); // its name
	Worksheet wks;
	wks.Create();
	for(int i=1;i<wks1.GetNumCols();i++)
	{
		wks.SetCell(i - 1,0,wks1.Columns(i).GetName()); // column name
		wks.SetCell(i - 1,1,wks1.Columns(i).GetLabel()); // column label
	}
	wks.Sort(1); // sort by label column
	Worksheet wks2;
	wks2.CreateCopy(wks1); // duplicate starting wks
	for(i=1;i<wks1.GetNumCols();i++) // delete all columns but X
		wks2.DeleteCol(1);
	Dataset ds1,ds2;
	string colName,colLabel;
	for(i=1;i<wks1.GetNumCols();i++)
	{
		wks.GetCell(i - 1,0,colName); // get name
		wks.GetCell(i - 1,1,colLabel); // get label
		wks2.AddCol(colName); // add column
		wks2.Columns(i).SetLabel(colLabel); // set label
		ds1.Attach(wksName + "_" + colName);
		ds2.Attach(wks2,i);
		ds2 = ds1; // copy data
	}
	wks.Destroy();
	wks1.Destroy();
	wks2.GetPage().Rename(wksName);
}