MFC - CString doesn't accept special characters

[Fresh Grass]

Is there any way to make CString in a MFC application accept special characters? The application crashes whenever user types unusual characters. I can replace specific characters, but that's not convenient at all, because there are too many of them.

[Fresh Grass]

For all that might have the same problem:

The problem was with isdigit(char) function. I've written my own function for digit check and now it works without issues.

So the problem might be with one of the functions you're using.