C++ Get Self File Name, Extension and Path

Hi I'm currently working on an application where I need to make a copy of the application in another directory from the current directory. While I have the copying part down, I can't seem to figure out how I would find the current path, file name and extension of the EXE thats running so that I can pass it to the function.

void main () 
{
	Copy();
}
 
void Copy()
{
 
	// _MAX_PATH is the maximum length allowed for a path
	char CurrentPath[_MAX_PATH];
	GetCurrentPath(CurrentPath);
 
//The complete path needs to go to this function.
	std::ifstream in (CurrentPath,ifstream::binary); // open original file
	std::ofstream out("c:/New.exe",ofstream::binary); // open target file
	out << in.rdbuf(); // read original file into target
	out.close(); // explicit close, unnecessary in this case
	in.close();// explicit close, unnecessary in this case
}
 
 //Currently using this to fine the path but this only returns the directory.
void GetCurrentPath(char* buffer)
{
	getcwd(buffer, _MAX_PATH);
}

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