read memory string?

hey guys i want create a little tool which can read the userid from memory.
i've already converted the array of bytes to string but now i need format like this in string "4E 69 63 6B 4E 61 6D 65 3A ?? ?? ?? ?? ??" i need these "??" for the search ...

What exactly are you trying to read from the memory? The "4E 69 63 6B 4E 61 6D 65 3A" means "NickName:".

Are you trying to read a player name? Then you should try to get the pointer of that name or if the name always starts with this pattern simply search for that and read the bytes after that pattern.