CString str1 = " This is a test string."; CString str2 = " \t Another test string."; CString str3 = "\t\t\t This one has even more whitespace."; // Removing leading whitespace from strings str1.TrimLeft(); str2.TrimLeft(); str3.TrimLeft(); // Outputting the results std::cout << str1 << std::endl; std::cout << str2 << std::endl; std::cout << str3 << std::endl; // Output: // "This is a test string." // "Another test string." // "This one has even more whitespace."These examples demonstrate how TrimLeft can be used to remove leading whitespace characters from strings. The first string `str1` has a leading space, so calling TrimLeft removes it. The second string `str2` has leading tabs and spaces, which are also removed. Finally, the third string `str3` has even more leading whitespace than the previous two strings, but it is all removed when TrimLeft is called. The MFC library is a package/library of tools and classes that can be used to develop Windows-based applications in C++. It was developed by Microsoft and is commonly used in conjunction with Visual Studio. TrimLeft is just one of the many methods available in the CString class, which is a part of the MFC library.