// 次のサンプルコードは、FloatingObjectRemovingイベントを使用します。 var customFloatingObject = new GC.Spread.Sheets.FloatingObjects.FloatingObject("f1", 10, 10, 60, 64); var btn = document.createElement('button'); btn.style.width = "60px"; btn.style.height = "30px"; btn.innerText = "button"; customFloatingObject.content(btn); activeSheet.floatingObjects.add(customFloatingObject); activeSheet.bind(GC.Spread.Sheets.Events.FloatingObjectRemoving, function (e, info) { info.cancel = true; });