GetModuleFileName 获得运行文件路径的问题

#include "Shlwapi.h"
#include <Windows.h>  
#include <iostream>   
#include <string>
using namespace std;   
   
string GetProgramDir()  
{   
    TCHAR exeFullPath[MAX_PATH]; // Full path
    string strPath = "";
    GetModuleFileName(NULL,exeFullPath,MAX_PATH);
    strPath=(string)exeFullPath;    // Get full path of the file，该行运行显示错误，代码见最后
    int pos = strPath.find_last_of('\\', strPath.length());
    return strPath.substr(0, pos);  // Return the directory without the file name
}   
 
int main ()
{
    string str = "";
    str = GetProgramDir();
    cout << str << endl;
    return 0;
}

运行后显示 error C2440: 'type cast' : cannot convert from 'TCHAR [260]' to 'std::string'。不知如何更改，请各路高手支招，多谢！