在对话框中嵌入另一个对话框，网上也有其他的历程，但是很多太复杂，没有针对性，本例程是一个简单的对话框嵌入的例子，方便初学者学习-Embedded in the dialog box to another dialog box, there are other online course, but many are too complicated, not relevant, this routine is a simple example of embedded dialog box, easy