Michel,
First of all, there is not ReadProcessMemory function/command in AC Tool.
The reason you had seen threads about the use of such function/command. Is because it is a function used in C++/Delphi/VB developement.
The only way to read any memory location in a game, from with in a AC Tool macro/script, is with the ReadMemory command.
You will find more information, including scripts that used it, in the Earth and Beyond forum. Read the following threads:
Memory 4 Dummiesand
Memory 4 Dummies, 2nd Ed.and
sb reset angle hack updatedThey have information on how to find the memory locations. And how to use them, although it is for E&B. The process will be the same for all other games.
The last thread has a macro/script called memkiller.mac. This macro was used to help the E&B'ers to read the character standing angle. When they enter a starbase, or reset the character position in a starbase. You could use this macro to help you with your attempts to read the memory location in the game you are playing in.
As for the size of the DWord, at the moment I can not seem to remember it. And I do not wish to make a guess on it's size. My best advise is for you to do a search on the net. As DWord type is a standard and you should be able to fined it's size is.
But, if you do not want to do that, then I would suggest that you experiement. To see what you end up with in your constant.