RegQueryInfoKey

function RegQueryInfoKey(

  hKey: HKEY;

  lpClass: LPTSTR;

  lpcbClass: LPDWORD;

  lpReserved: LPDWORD;

  lpcSubKeys: LPDWORD;

  lpcbMaxSubKeyLen: LPDWORD;

  lpcbMaxClassLen: LPDWORD;

  lpcValues: LPDWORD;

  lpcbMaxValueNameLen: LPDWORD;

  lpcbMaxValueLen: LPDWORD;

  lpcbSecurityDescriptor: LPDWORD;

  lpftLastWriteTime: PFILETIME

):LONG;