C#中如何实现拖动PictureBox控件-How to implement a drag in the CBox PictureBox control

C#中如何实现数据拖动？(拖动图片，到TextBox，并显示)-C# how to achieve data drag? (Drag the picture to the TextBox and display it)

以下是我用Qt GUI所编写的程序，包含源代码和可执行程序 主要功能： 1.绘制B样条 2.通过节点插入将B样条转化为多段Bezier曲线 操作方式：鼠标点击屏幕绘制B样条，默认均匀节点；控制点可以通过鼠标拖动(The following are the programs I wrote with Qt GUI, including the source code and the executable program Main functions: 1. draw B splines

这是一个用C语言实现的小项目，开发平台是Dev cpp，基于graphics.h库，程序实现了绘图功能，包括绘制直线、矩形、椭圆等，支持图形拖动和放缩，能够添加文本，可以说是一个简易版的CAD程序，具体功能介绍见资料中的ReadMe.txt(This is a small project implemented in C language. The development platform is Dev cpp. Based on graphics.h library, the program