Frame class structure:
~~~~~~~~~~~~~~~~~~~~~~
create class Frame from Loc
  export:
  var RowSize  //MaxRow()-7
  var ColSize  //MaxCol()-9
  var MaxRows  //MaxRow()-3
  var MaxCols  //MaxCol()-1
  var MinRows  //1
  var MinCols  //5
  var Screen   //""
  var Color    //ListAsArray(m->Color:Edit)[nEnhanced]
  var Visible  //false
  method New=FrameNew              //o:New() --> self
  method Init=FrameInit            //o:Init(R,C,Rs,Cs,Clr) --> true
  method Paint=FramePaint          //o:Paint() --> true
  method Hide=FrameHide            //o:Hide() --> true
  method Move=FrameMove            //o:Move(dR,dC) --> true
  method Size=FrameSize            //o:Size(dR,dC) --> true
  method Drag=FrameDrag            //o:Drag(lCanSize) --> true/false
  method Done=FrameDone            //o:Done() --> true
  endclass