VC++制作一个可收缩、展开功能的对话框，动态改变大小，用鼠标点击收缩则窗体会变小，再此点击则恢复原状，个人觉得很实用的程序。-VC++ produced a contraction of the dialog box to start function, dynamic changes in size, shrink the form with the mouse clicks will become small, and then click on the restitution of th