C# 拖动图像，并放大和缩小，使用了不少三方插件，比如AxInterop.OWC10.dll、AxSHDocVw.dll、Interop.OWC10.dll、Microsoft.Office.Interop.Graph.dll、Microsoft.Office.Interop.PowerPoint.dll、SHDocVw.dll、office.dll等，觉得程序实现的方法不是太简，用了这么多额外的控件，与实现的功能好像不成正比，呵呵，个人之见。

-C# Drag the image and zoom in and out, use a lot of three plug-ins, such as AxInterop.OWC10.dll, AxSHDocVw.dll, Interop.OWC10.dll, Microsoft.Office.Interop.Graph.dll, Microsoft.Office.Interop. PowerPoint.dll, SHDocVw.dll, office.dll so that methods of program implementation is not too simple, with so many additional controls, and the function does not seem to realize is proportional to, huh, huh, personal opinion.