// LabTalk Script
if(2 == exist(%h))
{
  // active window is a worksheet;
  // add columns etc using wks object;
  wks.addcol(somename);
  // see wks object for more methods/properties 
}



// Origin C code
void add_col_current_sheet()
{
	Worksheet wks = Project.ActiveLayer();
	if( wks )
	{
		wks.AddCol("somename");
		wks.GetPage().Refresh();
		// see Worksheet class for more methods and properties
	}
}

WorksheetPage wpg=wks.GetPage();
wpg.Rename("newname");