InDesign Dialog

How can I add Button in a Dialog ?

I'm using actionscript to do that:

var myDialog:Dialog = app.dialogs.add({name: "Export"});

var myMainColumn:DialogColumn = myDialog.dialogColumns.add().dialogRows.add().dialogColumns.add();

var myRow1:DialogRow = myMainColumn.dialogRows.add();

var myRow2:DialogRow = myMainColumn.dialogRows.add();

var pages:BorderPanel = myRow1.dialogColumns.add().borderPanels.add();

pages.dialogColumns.add().staticTexts.add({

     staticLabel: "Pages Range:"

});

var pagesRange:TextEditbox = pages.dialogColumns.add().textEditboxes.add({

     editContents: "1"

});

Another question is for do a BorderPanel with a Label, like:

enablingGroups.add({staticLabel:"Pages:", checkedState:true})

Many Thanks!!