void list_all()
{
	Folder fld = Application.ActiveFolder();
	foreach(PageBase pb in fld.Pages)
	{
		WorksheetPage wp = pb;
		if(!wp)
			continue;// not wkbook
		
		printf("Book:%s - %s\n", wp.GetName(), wp.GetLongName());
		int nn = 1;
		foreach(Layer ly in wp.Layers)
		{
			Worksheet wks = ly;
			printf(" %d:%s\n", nn++,wks.GetName());
			int kk = 1;
			foreach(Column cc in wks.Columns)
			{
				printf("   %d:Column(%s)\n", kk++, cc.GetName());
			}
		}
	}
}