[HELP] Writing string to memory

Hello! To play minecraft online you need to use Quick Memory Editor and search for a string "player" and then change it to what ever you want. I want to make a "hack" in vb that will automaticly change the string to whatever is typed in a textbox.
I used this: http://www.mpgh.net/forum/279-call-d...float-nop.html
to make a MW2 trainer but i think is only works with integers, floats...

So is there any way to "write the string to the memory"?
I know that the adress is 44D70D2C

I'm going to release a .dll in about 20 mins, gonna take a shower now(just came back from gym). Just watch out for a "MemHack V1.1" release in the next hour.