RAT_POSIT() Positions the mouse cursor at row,column
 coordinates

 Returns
 None

 Syntax
 RAT_POSIT(nRow,nColumn)

 Description
 Move the mouse cursor to nRow,nColumn.

 Examples
  RAT_OFF()

  RAT_POSIT(0,0)  // upper left hand corner

  RAT_ON()

 Notes:
 Be sure to RAT_OFF() before doing this.

 Source: S_MOUSE.ASM