Why not display the histogram?
The steps are not correct. First of all, in the class wizard, add a WM_Paint message to the class of the dialog box, and then add the OnPaint () function, and then the code of this function will automatically jump out.
Then write again! ! ! When you are free, be sure to take a good look at the steps. .
There are some small problems
1. There is a problem with the format of str.Format (). At the beginning, the format of the character set in the project properties was changed, but it caused a problem with the following message:
Prompt error (error C2665: "AfxMessageBox": none of the 2 overloads can convert all parameter types)
So I changed back to unicode
It should be str.Format (_T ("% d"), 10);