C++ :: Dereferencing Void Pointers Through The Way Of Typing It

I want to know how to dereference a void pointer through the way of typing it.

Lets just say that I malloc'd a huge bunch of memory and i can do whatever i want

void* randomData = malloc ( 1000000 );

And i decide to make my own virtual 'int'

I am not sure how to do this.

*( int* ) ( randomData + 10 ) = ( int ) 323453 //323453 can be an int variable aswell

Im not sure if this is the right way to do perform a dereference.

This is an overview of what has to be done:
-The pointer has to be dereferenced
-Cast the pointer as an int pointer so we can change it like a normal 4-byte int
-Perform pointer arithmetic, so that the int can be placed anywhere we want