在一些看图软件中，通常有对图像动态放大和缩小的功能。这是如何实现的呢？我们通过研究，在VB中实现了这种功能，具体方法如下。



　　进入VB，新建一工程，在窗体Form1上添加如下控件：一个图像框控件Image1，三个命令按钮Command1，Command2，Command3，其Caption性分别设置为“放大”、“缩小”、“打开”，再加入一个通用对话框控件CommonDialog1，用于选择要打开的文件。-in some flashcards software, the images are usually dynamic pan and zoom functions. This is how to achieve? Through research, in VB to achieve this function, specific methods are as follows. Enter VB, a new project, in the form Form1 add the following controls : an image frame controls Image1, three orders Command1 button, Command2. Command3, Caption, respectively set to "enlarge", "Go", "Open" the inclusion of a common dialog control CommonDialog1 for choice to open the document.