Delphi限制窗口大小不能被拉大，这个我觉得还是挺实用的，比较综合的Delphi项目中或许会用到。本例所演示的效果中，窗口被限制为400*250，即使再次拉大窗口后，窗口也不会变大，只能在长度：400、宽度250的范围内变小，不能被放大。

-Delphi does not limit the size of the window, pulled a large, I think this is very useful, more integrated Delphi project may be used. This example demonstrates the effect of the window is limited to 400* 250, even after the window is widened again, the window does not become large, only the length: 400, width 250 is within a small range and can not be enlarged.