A method of forming a semiconductor structure includes providing a semiconductor substrate and forming a memory cell at a surface of the semiconductor substrate. While the cursor is within a region, an associated function effects the displayed graphical information in a particular way, such as continuously panning, drawing, zooming, or rotating. First and second retaining projections which retain the lever by engaging with a retaining portion provided on the lever are provided at opposite ends of the opposite sides of the connector housing. Upper injection devices are arranged so that an energy-rich medium is supplyable to the melting and superheating section immediately below a level of the narrowing section.