MultiByteToWideChar 不能正常工作

Question

I'm trying to use MultiByteToWideChar api. for lpWideCharStr , when I use a pointer with dynamic memory allocation, it works properly. but now I should use a pointer with static memory allocation as you see in the code. and it doesn't work properly, return 0.

what's wrong with it?

how should I use a static memory allocated pointer for lpWideCharStr in MultiByteToWideChar ?

thank's for your solutions.

#include <windows.h>
#include <iostream>
#include "Shlwapi.h"

#pragma comment(lib,"shlwapi.lib")

void main(int argc, char *argv[]){

    int iToSizeB = 0;
    iToSizeB = MultiByteToWideChar(CP_UTF8, 0, argv[1], -1 , NULL, 0);

    LPWSTR lpFileAddress[260] = {0};
    int nResult = 0;

    //MultiByteToWideChar function reurns 0 !!!
    nResult = MultiByteToWideChar(CP_UTF8, 0, argv[1], -1, lpFileAddress[0], iToSizeB);
}

Answer 1

Probably you mean this:

WCHAR lpFileAddress[260] = {0};
nResult = MultiByteToWideChar(CP_UTF8, 0, argv[1], -1, lpFileAddress, iToSizeB);

In your code, you define array of WCHAR pointers: LPWSTR lpFileAddress[260] instead of WCHAR array, as required: WCHAR lpFileAddress[260] = {0};