why FileUtils::CopyFile doesn't work with blank space?

Hi all,

If I have a destination directory with blank space inside, looks like: "C:\Users\Pattrick James\Documents" for Windows or "Macintosh HD:Users:Pattrick James:Documents" for Mac.

Then I want to copy a file to that directory, use FileUtils::CopyFile(src, des). Why it doesn't work?

Can someone please help me to resolve this issue without change my path?