Append the data in File Problem

Hi All,
I need a help on File Append Data Problem.
In NtClose for Small Size File like less than 50 byte I am able to Append
the Data.
I am using ZwCreateFile and ZwWriteFile.
For Big File like 234666 Byte I have tested NTSTATUS of ZwWriteFile returns
me 0xC0000002: return “STATUS_NOT_IMPLEMENTED”;

Is there any way I can Append the data in File

Utkarsh S. Dabhade

Utkarsh S. Dabhade

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