当鼠标点在圆的外接四边形内圆的颜色将改变,并且实现了滚动条的功能-when the click of the mouse in the external Quadrilateral Yuan Yuan within the color will change, and the realization of the functional rolling
本书对于要求实践的人是不错的选择,介绍了powerbuilder的应用范围,和一些案例,编程细节,希望能过帮助大家。-This book is to urge the practice is a good choice, PowerBuilder introduced the scope of application, and some cases, programming details, hoping to have a helping hand.