1.建立一个基于Dialog的MFC工程；

2.设置在Dialog窗体宽度为500，在其第一行位置放置一个组合框和一个按钮；

3.组合框设置8个默认选项，选项的内容分别是数字1，2，3，4，5，6，7，8

4.组合框允许输入数字，范围是0-50

5.按钮标题是“Do it”

6.点击“Do it”按钮，实现功能：①根据组合框填写或选择的数值（假设该值是n），创建n个按钮，每个按钮的大小都是高25长40，从界面上第二行开始显示，每一行显示的按钮数不超过（10-行号），超过时自动显示到下一行（其中行号从0开始）；②每个创建的按钮标题是按钮的序号，即0,1,2…n-1，按钮的背景颜色和文本颜色都是随机值；③但点击创建的按钮时，在Dialog窗口的标题显示该按钮相关的信息，包括标题内容，背景颜色值，文本颜色值（其中颜色以字符串"RGB(r,g,b)"格式，r,g,b分别代表颜色的红绿蓝分量）。

-(1) Establish a Dialog-based MFC project

(2) set the width of the Dialog form 500 in its first line location to place a combo box and a button

3 combo box set eight default option, option is the number 1, 2, 3, 4, 5, 6, 7, 8

Combo box allows you to enter numbers, range 0-50

5 button title is "Do it."

Click the "Do it" button, the realization of functions: (1) complete or selected value of a combo box (the value is assumed to n), to create the n button, the size of each button are 25 long 40, from the interface first the two lines begin to show, each row shows the number of buttons does not exceed (10- line number) over automatically to the next line (line number starting from 0)　② each created button title is the serial number of the button, that is, 0 , 1,2 ... n-1, the button s background color and text color are random values​ ​　 ③ Click Create button, the button-related information, including the title content, the value of the background color, text is displayed