Contextual Menu question involving graphs

<br />
// adds hook to graph<br />
Function AllowSelectioninTopGraph()<br />
    Setwindow kwtopwin hook(contextual)=contextualwindowhook<br />
end<br />
//Dynamic menus for the contextual menu<br />
Menu  "TraceGraphMenu", contextualmenu, dynamic<br />
    "Duplicate Graph", DuplicateTopGraph()<br />
    "IdentifyTraces",/Q, GetTraces()<br />
End<br />
<br />
Menu  "GraphMenu", contextualmenu, dynamic<br />
    submenu "Graph"<br />
        "Append Traces to Graph...", doIgorMenu "graph", "Append Traces to Graph"<br />
        "Remove From Graph...", doIgorMenu "graph", "Remove From Graph"<br />
        "-"<br />
        "Modify Graph...", doIgorMenu "graph", "Modify Graph"<br />
        "Modify Trace Appearance", doIgorMenu "graph","Modify Trace Appearance"<br />
        "Reorder Traces", doIgorMenu "graph","Reorder Traces"<br />
        "Modify Contour Appearance", doIgorMenu "graph","Modify Contour Appearance"<br />
        "Modify Image Appearance", doIgorMenu "graph","Modify Image Appearance"<br />
        "-"<br />
        "Autoscale Axes", doIgorMenu "graph", "AutoScale Axes"<br />
        "Axis Properties", doIgorMenu "graph", "Modify Axis"<br />
        <br />
        "Add Annotation", doIgorMenu "graph","Add Annotation"<br />
    end<br />
    Submenu "AJ Graph Additions"<br />
        "Append a Wave"<br />
        help = {"Append a wave to the current graph"}<br />
        "Add cursor status", CursorReadCP()<br />
        help={"Adds cursor status to the top graph"}<br />
        "Duplicate Graph[s]",DuplicateGraphPrompt()<br />
        "Duplicate Top Graph", DuplicateTopGraph()<br />
        help={"Duplicates a graph"}<br />
        "Place Model Info on Graph", PlaceModelInfoFunction()<br />
        help = {"Place model info on selected graphs"}<br />
        "Add Centerline Indicator", AddCenterlineIndicator()<br />
        "Add Legend/1", Legend<br />
        "Add Right Axes", AddRightAxis()<br />
        "Label Axes", LabelAxes()<br />
        "Label Right Axis", LabelRightAxis()<br />
    end<br />
    submenu "Trace"<br />
        "Tracepopup", Menu "Tracepopup"<br />
    end<br />
End<br />
<br />
Function Contextualwindowhook(hs)<br />
//Contextual menu code.<br />
//To Create a contextual menu without a premade menu use:<br />
//          PopupcontextualMenu/c =(hs.mouseloc.h, hs.mouseLoc.v) "Select;Deseclect;Hello;"<br />
//          Strswitch(S_selection)<br />
//              case "Select":<br />
//                  ModifyGraph swapXY=1<br />
//                  break<br />
//              case "Deselect":<br />
//                  ModifyGraph swapXY=0<br />
//                  break<br />
//              case "hello":<br />
//                  print "hello"<br />
//          endswitch<br />
//otherwise use /n and the name of the dynamic menu<br />
    Struct WMWinHookStruct &hs<br />
    Variable ret=0<br />
    strswitch(hs.eventName)<br />
        case "mousedown":<br />
        variable iscontextualmenu = hs.eventmod%& 0x10<br />
        //acontextual click is a right-click on windows or a control-click on MAC <br />
        if( !isContextualmenu )<br />
            break // allow normal click handling<br />
        endif<br />
        //allows a contextual menu on the trace<br />
        String clickedTraceinfo = TraceFromPixel(hs.mouseLoc.h,HS.MouseLoc.v,"")<br />
        If(Strlen(ClickedTraceInfo))<br />
            string tn=StringbyKey("Trace",ClickedTraceInfo)<br />
            PopupcontextualMenu/c =(hs.mouseloc.h, hs.mouseLoc.v)/N "TraceGraphMenu"<br />
            break<br />
        else //allows a contextual menu anywhere else on the graph<br />
            PopupcontextualMenu/c =(hs.mouseloc.h, hs.mouseLoc.v)/n "GraphMenu"<br />
            ret=1<br />
            break<br />
        endif<br />
    endswitch<br />
    return ret<br />
end<br />