What you want would have to be a part of the game engine. Unless the game developers specifically created a way to interact with the game engine via some external program, or made it a part of the game themselves, it's not going to be possible.
Also, you shouldn't need third party software just to do dual screen. This should be supported natively by Win98 and later.
As I set up my Dual Monitor I am excited straight away of the prospect of doing 2 things at once, so I install the second monitor on my 6600GT graphics card and install UltraMon software (thanks CNET people's for the recommendation). Everything is working perfectly, so I come up with this idea for some software and search the Internet (google my saviour) but cannot find what I'm after, and alas CNET I can't seem to find anyone to help we here either, so I am posting with my idea and hoping someone has some ideas.
Here's my idea.
I play WoW and other games and wish that they supported dual monitoring, I know that I can change the resolution and have the screens connected viewed as one big one, but I would rather other information to be on the second monitor.
So I'm thinking, how hard would it be for some software that can take a snapshot of a screen and move it to the other monitor and keep it there until I want to close it. I'll try and clarify. Imagine I am playing Civilisation IV, there is an ability to zoom in and out so that you can have a close up view or an overview of the area in play. So imagine if I want to play zoomed in, but also have a zoomed out view for me to look at when I want to. So if I had my way the game would support dual monitoring in this way, but it doesn't, so instead I would like to have a zoomed out view on my second monitor. I understand that the game itself may not allow this, but surely, there must be a way that there can be to make a snapshot of the screen, copy it to the other monitor and have it stay there (changing as the game progresses).
This idea can work with other games too, for example WoW with the map on the second screen.
The main concept is that the idea requires some software that can take a screenshot of what I want and have it update in real time, as if I was accessing that information in the game anyway.
The easiest way I can explain it is imagine pressing the "Print Screen" button on the keyboard, now paste it into "Paint" (or whatever) and pull it across to the other screen. Now imagine that that screen dump was 'live' and was being updated so that it was 'like' the program (eg game) was designed for that extra screen.
I hope my rambling has explained my idea/question enough.
So if anyone knows of some software that can help turn non-dual monitor games/programs into pseudo-dual monitor games/programs please let me know.
otherwise sorry for the long read and thank you for your time
PS. sorry if this was meant to be in the software thread or any other thread.