C语言如何实现程序开机自启动

#include<stdio.h>
#include<windows.h>

char *GetFilename(char *p) //得到一个路径的纯文件名
{
  int x=strlen(p);
  char ch='\\';
  char *q=strrchr(p,ch);
  return q;
}

int main()
{
  char *filepath;
  char modlepath[256];
  char syspath[256];

  //打开酷狗应用
  filepath="C:\\Program^ Files\\KuGou\\KGMusic\\KuGou.exe"; 
  system(filepath);

  //将程序移动到系统目录下

  GetModuleFileName(0,modlepath,256); //获得自身路径
  GetSystemDirectory(syspath,256); //得到系统路径

  int ret=CopyFile(modlepath,strcat(syspath,GetFilename(modlepath)),1);//复制，CopyFile的第二个参数是目标文件名
  if(ret)
  {
    printf("%s has been copyed to sys dir %s\n",modlepath,syspath);
  }
  else
  {
    printf("%s is exists",modlepath);
  }

  //程序添加开机自启动
  char regname[]="Software\\Microsoft\\Windows\\CurrentVersion\\Run";
  HKEY hKey;
  ret=RegOpenKey(HKEY_LOCAL_MACHINE,regname,&hKey);    //打开注册表键
  ret=RegSetValueEx(hKey,"MyProm",0,REG_EXPAND_SZ,(unsigned char*)strcat(syspath,GetFilename(modlepath)),25); //设置键值

  if(ret==0)
  {
    printf("succes to write run key.\n");
    RegCloseKey(hKey);
  }
  else
  {
    printf("failed to open regedit.%d\n",ret);
    return 0;
  }
  
  return 0;
}