Ok then here is a better question, what is the best way to emulate WA as if I were playing it in the year 2002?
W:A at release and prior to replays patch used DX7 and/or DirectDraw depending if your graphics card could support DX7. You remember when installing W:A from cd it asked you to install Dx7? Vsync at that time was not very common and Vsync on/off was not an option to choose. At the time we used to warm, Komo, we did not have Vsync it wasn't even an option. I remember W:A prior to DX9 and Vsync to be like DirectDraw 32, no delay but not very smooth animation, it was capped at 30 FPS (I think). I found plenty evidence of Vsync causing input lag, from many sites and debug programs that can show it, for example:
Basically the mouse cursor should be in the top left of the blue square, if it isnt you can see the input lag.
DirectX 9 Results:
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FullScreen - No Fixes: Huge lag : 62 FPS
FullScreen - DX9 Fix : Slight lag: 62 FPS
FullScreen - Grab Pixel Fix: Slight lag: 40FPS
Window - No Fixes: Slight lag : 62 FPS
Window - DX9 Fix : Slight lag: 62 FPS
Window - Grab Pixel Fix: Slight lag: 62FPS
DirectX 7 Results:
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FullScreen - No Fixes: Slight lag : 62 FPS
FullScreen - DX9 Fix : Slight lag: 62 FPS
FullScreen - Grab Pixel Fix: Slight lag: 62FPS
Window - No Fixes: No lag : 62 FPS
Window - DX9 Fix : No lag: 62 FPS
Window - Grab Pixel Fix: No lag: 62FPS
It seems DX9 causes a lot of issues with input lag and even DX7 seems to do so when not in Window mode. If you want to go back in time use DX7 without Vsync or DirectDraw 32 or 8 and relive what it was like to rope back then.
Edit: Except I am not sure if W:A emulates the 30 FPS cap when not in DX9 mode.