“函数”: 从“char [7]”到“LPCWSTR”的类型不兼容
Main.c
#include "stdafx.h"
#include "Win32Project15.h"
#include"Resource.h"
#include<COMMCTRL.H>
#pragma comment(lib,"comctl32.lib")

int APIENTRY _tWinMain(HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPWSTR    lpCmdLine,
    int       nCmdShow)
{
    InitCommonControls();
    DialogBox(hPrevInstance,MAKEINTRESOURCE(IDD_MAIN),NULL,Main_Proc);
    return 0;
}
Win32Project15.c


#include "stdafx.h"
#include<windows.h>
#include<windowsx.h>
#include"Resource.h"
#include "Win32Project15.h"

#pragma comment(lib,"comctl32.lib")

BOOL   WINAPI  Main_Proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
        HANDLE_MSG(hwnd, WM_INITDIALOG, Main_onlnicDialog);
        HANDLE_MSG(hwnd, WM_COMMAND, Main_onCommand);
        HANDLE_MSG(hwnd, WM_CLOSE, Main_Close);
        
    }
return FALSE;
}
BOOL Main_onlnicDialog(HWND hwnd, HWND hwndm, LPARAM lParam)
{
    return TRUE;
}
void Main_onCommand(HWND hwnd, int id, HWND hwndCTl, UINT codeNotify)
{
    switch (id)
    {
    case IDOK:
    {
        TCHAR name[256];
        GetDlgItemText(hwnd, IDC_EDITNAME,name , sizeof(name));
        
      TCHAR msg[256];
      wsprintf(msg,"%s你好",name);
      MessageBox(hwnd, msg, msg, MB_OK);
      break;
    }   
    default:
        break;
    }
}
void Main_Close(HWND hwnd)
{
    EndDialog(hwnd, 0);
}
 Win32Project15.h
#pragma once

#include "resource.h"
#ifndef __WIN32PROJECT_H__
#define __WIN32PROJECT_H__


BOOL WINAPI Main_Proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
BOOL Main_onlnicDialog(HWND hwnd, HWND hwndm, LPARAM lParam);
void Main_onCommand(HWND hwnd, int id, HWND hwndCTl, UINT codeNotify);
void Main_Close(HWND hwnd);
#endif

LPCWSTR在哪出现过其实我都没找到。。。你说他和Char[7]不匹配。
那么PLCWSTR又应该是什么呢？char*吗？不像吧。。

在Main.c,我用的是TCHAR

wsprintf(msg,L"%s你好",name);

谢谢，好了，为什么是L

作为WIN32环境的常识，引用了wsprintf就说明你要使用的宽字符，而确保字符串常量使用宽字符的就是前置的L
总之，带w的环境下（wsprintf，LPCWSTR都有w哦）的字符串常量就要用L前缀保持兼容性。

一个是ANSI标准，一个是Unicode标准