Dear sir,
I have some trouble in some games in laptop ,specially in some games needs hi vga
I have laptop of vga about 800 mb so
1-how can I increase the vga of this laptop
2-why the vga in vista not same in xp?
3-is there any software of hardware do accelerate the game?

I'm not sure I follow you? You are wanting a higher resolution for some of your games I assume? And you mention that the resolution isn't the same on Vista compared to XP? If you right click your desktop, go down to properties, go to the settings tab and see what it says for screen resolution. Usually you can change it there, but keep in mind that laptops use LCD screens, and they usually can do a few different resolutions up to a maximum. If you are at maximum, then unfortunately that's as high as that screen will go. The only way around that, and this depends on the laptop, if there is a VGA or DVI output, sometimes you can connect an external monitor that'll allow for a higher resolution.