图形按钮控件，旋转按钮，在其按钮上的绿色旋钮会跟着转动。-graphics button controls, rotating button, in his green button on the knob rotation will follow.

旋钮控件。此控件有四个状态，分别用1,2,3,4表示。用鼠标转动旋钮则mvalue属性对应这四个数值。-Knob control. This control has four states, respectively 1,2,3,4 said. Turn the knob with the mouse while mvalue attribute values corresponding to these four.

关于旋钮的例子，属于activx控件，节省资源，使用方便-Examples on the knob, is activx control, resource saving, easy to use

基于MFC的VC++程序报告，常用控件之6旋转按钮控件——旋钮控制矩形和学生成绩输入-MFC-based VC++ program reports, the six commonly used controls spin button control- knob controls the input rectangles and student achievement