用户控件测试包，包括拖动按钮的例子，还有选择绘制选择区域的功能，鼠标拖动过程中绘制框

在按钮的控制下，通过鼠标拖动来画直线和圆，轻松自如。-Under the control of the button, through the mouse to draw a line and round, easily.

用VC++开发的一个画笔，通过拖动鼠标左键可以实现绘画，但画笔颜色更改不了，画笔不能出现，还请高手指点。-VC++ development with a brush, can be achieved by dragging the left mouse button painting, but can not change the pen color, pen can not appear, please also master pointers.

cxgrid 拖放移动记录,cxgrid 拖放,cxgrid 拖动记录,cxgrid 鼠标拖动记录 这是cxgrid开发公司回复客户时所发送的源码项目，用于实现鼠标拖动记录，改变记录在表格中的位置,所以直接编译运行，供大家借鉴 -The record cxgrid drag and drop mobile cxgrid drag and drop, drag record cxgrid, cxgrid mouse to drag the record This is sent cxg