MBRZMOVE()

  Short:
  ------
  MBRZMOVE() Checks for mouse click at and moves to Tbrowse row/col

  Returns:
  --------
  <lClicked> => If the mouse clicked on a new Tbrowse Row/Column.

  Syntax:
  -------
  MBRZMOVE(oTBrowse, nMouseRow, nMouseCol,[nTop,nLeft,nBottom,nRight])

  Description:
  ------------
  Determines if the mouse coordinates <nMouseRow> and <nMouseCol>
  are on a new Tbrowse row/column, and causes the Tbrowse cursor to
  move there.

  [nTop,nLeft,nBottom,nRight] determine the Tbrowse 'live' area - the
  area exclusive of headers, footers, seperators etc. MBRZMOVE() can
  determine this on its own, but it is much faster to pass these
  coordinates if you can.

  Examples:
  ---------
  from MCHOICE():

   case nLastKey == K_MOUSELEFT
     do case
     case ISMOUSEAT(nMouseR, nMouseC, nBottom,nRight-3, nBottom, nRight-2)
        oTb:down()
        IFMOUSEHD({||oTb:down()},oTb)
     case MBRZMOVE(oTb,nMouseR, nMouseC,nTop+1,nLeft+1,nBottom-1,nRight-1)
        keyboard chr(K_ENTER)
     case MBRZMOVE(oTb,nMouseR, nMouseC)
        EXIT
     endcase
   endcase

  Source:
  -------
  S_MOOSE.PRG