Delete key and subkey from registry:Code throw unhandled exception - c++

Question

I want to delete the Registry key and the all subkey.I am using the code from here.
Code compile fine but when debug the code
"Unhandled exception at 0x00416d14 in deletedemo.exe: 0xC0000005: Access violation writing location 0x0041ff01."
exception occur at the line
// Check for an ending slash and add one if it is missing.
lpEnd = lpSubKey + lstrlen(lpSubKey);
if (*(lpEnd - 1) != TEXT('\\'))
{
*lpEnd = TEXT('\\'); //Here exception occur.
lpEnd++;
*lpEnd = TEXT('\0');
}

Answer 1

I have written a code to delete the Registry Key and its Subkeys recursively some time ago. The code goes like this::
static BOOL RcrsvRegDel( HKEY hKey, LPTSTR lpszSub, DWORD dwOpenFlags )
{
BOOL bRet = TRUE ;
LONG lRet ;
DWORD dwSize = MAX_PATH ;
TCHAR szName[MAX_PATH] ;
HKEY hKeySub = NULL ;
HRESULT hr = NULL ;
HANDLE hProcess = NULL ;
HANDLE hToken = NULL ;
do{
lRet = RegOpenKeyEx( hKey, lpszSub, 0, dwOpenFlags, &hKeySub ) ;
if( lRet != ERROR_SUCCESS )
{
bRet = FALSE ;
break ;
}
while( ERROR_NO_MORE_ITEMS != (lRet = RegEnumKeyEx(hKeySub, 0, szName, &dwSize, NULL,
NULL, NULL, NULL)) )
if( !RcrsvRegDel(hKeySub, szName, dwOpenFlags) )
{
bRet = FALSE ;
break ;
}
lRet = RegDeleteKey( hKey, lpszSub ) ;
printf("RegDelKey:: %S :: lRet = %ld\n", lpszSub, lRet) ;
if( lRet != ERROR_SUCCESS )
{
bRet = FALSE ;
break ;
}
if( hKeySub != NULL )
{
RegCloseKey(hKeySub) ;
hKeySub = NULL ;
}
}while(0) ;
return bRet ;
}
dwOpenFlags = Flags to be passed to RegOpenKeyEx or RegDeleteKey.
EDIT:: If you do not want to delete the whole tree yourself recursively, MSDN have two functions to do this. You can always use them, namely, RegDeleteTree and SHDeleteKey.