在textbox里放按钮并控制输入字符不能覆盖住按钮(包括设计阶段)[3]

 public event myclick(byval sender as object, byval e as eventargs)

    private sub btn_click(byval sender as object, byval e as system.eventargs) handles btn.click

        raiseevent myclick(me, e)

    end sub

 private sub btn_mouseenter(byval sender as object, byval e as system.eventargs) handles btn.mouseenter

 private sub btn_mouseenter(byval sender as object, byval e as system.eventargs) handles btn.mouseenter

        cursor = cursors.default

    end sub

 private sub btn_mouseleave(byval sender as object, byval e as system.eventargs) handles btn.mouseleave