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;}