该代码主要是一个基于单文档的按钮控件的应用，主要包括：在按钮上载入位图，载入图标，其中按钮又包括：保持按钮，非保持按钮等-The code is primarily a document based on single-button control applications, including: the button on the loading bitmaps, loading icons, buttons which also include: maintaining the button