CStdStringW str(L"Hello, world!");
CStdStringW str1(L"Hello"); CStdStringW str2(L", world!"); CStdStringW result = str1 + str2;
CStdStringW str(L"Hello, world!"); int length = str.GetLength();This code initializes a CStdStringW object named "str" with the value "Hello, world!" and then retrieves its length using the GetLength() function, which returns an integer value. Overall, CStdStringW is a useful class for working with strings of wide characters in C++, and it is part of the ATL library on Windows systems.