【求助】关于用C++打开word文件的问题

菜鸟一只，请大家帮我看看这东西错在哪里了？要怎么改？
#include <stdio.h>
#include <windows.h>
#include <process.h>
void main()
{   
    int a;
    int b;
    printf("请输入管理员密码。\n");
    scanf("%d",&a);
    if(a == 123456)
        {
            printf("登陆成功！请稍候。。。\n");
            printf("您好！风，您想做什么？\n");
            printf("-----------------------------------------\n");
            printf("1.打开日记请输入1。\n");
            printf("2.打开笔记本请输入2。\n");
            printf("3.退出请关闭。\n");
            scanf("%d",&b);
            switch(b)
                {
                case 1:
                    printf("正在打开日记。。。请稍候。\n");
                    ShellExecute(handle, "open", "word的路径", NULL, NULL, SW_SHOWNORMAL);

                }
   
        }



}