registry programming in C

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

main()
{


    HKEY i;
char info[200];
DWORD l;
   RegCreateKey(HKEY_CURRENT_USER,"Software\\shifat2",&i);
   RegSetValueExA(i,"hello",0,REG_SZ,"hello shifat",12);
   RegCloseKey(i);

   RegOpenKeyA(HKEY_LOCAL_MACHINE,"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run",&i);
   RegQueryValueExA(i,"welcome",0,NULL,(LPBYTE)info,&l);
   RegCloseKey(i);
   printf("%s",info);
   _getch();

   return 0;
}





/*

values of hkey

HKEY_CLASSES_ROOT 0x80000000
HKEY_CURRENT_USER 0x80000001
HKEY_LOCAL_MACHINE 0x80000002
HKEY_USERS 0x80000003
HKEY_CURRENT_CONFIG 0x80000005

*/