How to use "RegSaveKey"?   

Dear all!
     I try to make a backup of the registry!
     first,I open the key and save the handle like this:
          RegOpenKeyEx  
(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\Services",NULL,KEY_ALL_AC 
CESS,(PHKEY)&hKey);

     then,I try to save it to a txt file:
           RegSaveKey(hKey,"f:\\abc.txt",null);

      but an error occur:"A required privilege is not held by the client."

all  codes:
int _tmain(int argc, _TCHAR* argv[])
{
	HKEY  hKey;
	HLOCAL hlocal = NULL;

    DWORD dwError = 
RegOpenKeyEx(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\Services",NULL,KEY_ALL_ACCESS,(PHKEY)&hKey);
	if(dwError == ERROR_SUCCESS)
	{
  

	dwError = RegSaveKey(hKey,"f:\\abc.txt",null);  

        if(dwError == ERROR_SUCCESS)
		   MessageBox(NULL,"ok!",NULL,MB_OK);

		else
		{
            FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM | 
FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError, MAKELANGID(LANG_ENGLISH, 
SUBLANG_ENGLISH_US),(PTSTR)&hlocal, 0, NULL);
            MessageBox(NULL,(LPCSTR)hlocal,NULL,MB_OK);
		}
		RegCloseKey(hKey);
	}
	return 0;
}

date: Thu, 30 Mar 2006 04:07:39 -0800   author:   troylees

RE: How to use "RegSaveKey"?   

he problem has been solved.The process which calls RegSaveKey must have got 
the authority of SE_BACKUP_NAME.  See :
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/regsavekey.asp


"troylees" wrote:

> Dear all!
>      I try to make a backup of the registry!
>      first,I open the key and save the handle like this:
>           RegOpenKeyEx  
> (HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\Services",NULL,KEY_ALL_AC 
> CESS,(PHKEY)&hKey);
> 
>      then,I try to save it to a txt file:
>            RegSaveKey(hKey,"f:\\abc.txt",null);
> 
>       but an error occur:"A required privilege is not held by the client."
> 
> all  codes:
> int _tmain(int argc, _TCHAR* argv[])
> {
> 	HKEY  hKey;
> 	HLOCAL hlocal = NULL;
> 
>     DWORD dwError = 
> RegOpenKeyEx(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\Services",NULL,KEY_ALL_ACCESS,(PHKEY)&hKey);
> 	if(dwError == ERROR_SUCCESS)
> 	{
>   
> 
> 	dwError = RegSaveKey(hKey,"f:\\abc.txt",null);  
> 
>         if(dwError == ERROR_SUCCESS)
> 		   MessageBox(NULL,"ok!",NULL,MB_OK);
> 
> 		else
> 		{
>             FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM | 
> FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError, MAKELANGID(LANG_ENGLISH, 
> SUBLANG_ENGLISH_US),(PTSTR)&hlocal, 0, NULL);
>             MessageBox(NULL,(LPCSTR)hlocal,NULL,MB_OK);
> 		}
> 		RegCloseKey(hKey);
> 	}
> 	return 0;
> }
>

date: Thu, 30 Mar 2006 08:22:02 -0800   author:   troylees

Re: How to use "RegSaveKey"?   

troylees wrote:

> he problem has been solved.The process which calls RegSaveKey must have got 
> the authority of SE_BACKUP_NAME.  See :

Another thing, the files saved by RegSaveKey() are not text files, they 
are binary database files that can be used only by the RegLoadKey(), 
RegRestoreKey() and RegReplaceKey() functions.

-- 
Olof Lagerkvist
ICQ: 724451
Web: http://here.is/olof

date: Sat, 01 Apr 2006 00:56:28 GMT   author:   Olof Lagerkvist ess