使用dos null字节读取文本文件

I have a text file with dos elements - hex(00) for exampel. I need to read it and convert it. Have tried to use utf8toansi, but this removes the whole line with hex(00). Are there any way to convert to text in the whole file ? I am using win32, RadStudio2007, Delphi.I have a text file with dos elements - hex(00)