Convert std::string to LPCWSTR in C++
C++ provides us a facility using which one can represent a sequence of characters as an object of a class. This class is std::string. Internally, std::string class represents a string as a sequence of characters (bytes) and each character can be accessed using the  operator.
The difference between a character array and a string is that a character array is simply an array of characters terminated with a null character whereas a string class is part of the C++ library that gives us the functionality to create objects in which we can store string literals easily. A string can be declared and initialized by using the below syntax,
string str = “GeeksforGeeks”;
LPWCSTR stands for Long Pointer to Constant Wide STRing. It is a 32-bit pointer to a constant string of 16-bit Unicode characters, which may be null-terminated. In simple words, it is the same as a string but with wide characters.
LPCWSTR str = “GeeksforGeeks”;
This string is Microsoft defined and programmers are required to include <Window.h> header file to use LPCWSTR strings. This article focuses on how to convert std::string to LPCWSTR in C++ (Unicode).
Converting a std::string to LPCWSTR in C++ (Unicode)
Converting a string to LPCWSTR is a two-step process.
Step1: First step is to convert the initialized object of the String class into a wstring. std::wstring is used for wide-character/Unicode (UTF-16) strings. The transformation can be easily done by passing endpoint iterators of the given string to the std::wstring() initializer.
It returns a wstring object.
Step 2: Next step is to apply the c_str() method on the returned wstring object (obtained from step1). It will return the equivalent LPCWSTR string. The above process has been demonstrated through the below source code.
Below is the C++ program to implement the above approach-
str is: “GeeksforGeeks”
wideString is: “GeeksforGeeks”