Hooking ZwQueryDirectoryFile in windows7 32bit

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C++

programming

driver

Dear all
I'm new in driver programming and I want to hook ZwQueryDirectoryFile to hide files in win7. It works fine but when I want to create a file with the name of hidden files, it shows a blue screen. I think I should hook NtQueryAttributesFile, but I can't find the equal zw routin.
Here is my code:

if(FileInformationClass == 37)
{
	PFILE_ID_BOTH_DIR_INFORMATION current = (PFILE_ID_BOTH_DIR_INFORMATION)FileInformation; 
	PFILE_ID_BOTH_DIR_INFORMATION previous = NULL;
	do
	{
		RtlInitAnsiString(&ansiFileName, "");
		if(current!= NULL)
		{
			if(current->FileName!= NULL)
			{
				RtlInitUnicodeString(&uniFileName, current->FileName);
				RtlUnicodeStringToAnsiString(&ansiFileName, &uniFileName, TRUE);
				if(RtlCompareMemory(ansiFileName.Buffer, HideFileOne.Buffer, HideFileOne.Length) == HideFileOne.Length)
				{
					if(!(current->NextEntryOffset))
					{
						previous->NextEntryOffset = 0;
						break;
					} 
					else
					{
						int iPos = ((ULONG)current) - (ULONG)FileInformation;
						int iLeft = (DWORD)Length - iPos - current->NextEntryOffset;
						RtlCopyMemory((PVOID)current, (PVOID)((char *)current + current->NextEntryOffset), (DWORD)iLeft );
						continue;
					}
				}
				previous = current;
				current = (PFILE_ID_BOTH_DIR_INFORMATION)((char *)current + current->NextEntryOffset);
			}
		}
	}while(current->NextEntryOffset);

I also check the value of 1,2 and 3 for FileInformationClass.
I am waiting for your answers.
Thanks for all guidance