RE: Multiple Monitor geometery
JHaggerty
primary screen is always the origin of the desktop. When you move another
screen to the left of the primary, its RelativeX should be negative,
likewise, when a screen is above the primary, its RelativeX will be negative.
Some of your numbers make sense - 0xFFFFFC00 = 1024 decimal, for example, but
some of them are a little hard to parse. Are your screens different sizes and
not lined up edge-to-edge?
You didn't mention which OS you're using, but I think in all of them since
Win2K you can hover the mouse pointer over the screen icons in the Display
Properties / Settings page and a pop-up will pop up that tells you the
co-ordinates of each screen. You can see the negative values there.
--
JHaggerty
"jpatrcik" wrote:
> I have to back up and restore multiple monitor information, including the
> relative positions of the primary video device to the secondary (or extended)
> video device. Digging in he registry, I find the video GUIDs for the primary
> and secondary video devices, but I am perplexed at the settings on the
> secondary device. For instance, the Attach.RelativeX and the Attach.RelativeY
> for the secondary device positined to the right of the primary device is 1280
> and 0 respectively, just what you'd assume if the primary monitor had a 1280
> horizontal resolution. So far, so good. However, if I move the secondary
> video device (extended desktop) directly on top of the primary monitor, the
> results are Attach.RelativeX=0xfffff70 (4294967152) and
> Attach.RelativeY=0xffffC00 (4294966272). This is confusing, since I'd expect
> them to be Attach.RelativeX=768 (horizontal resolution of primary) and
> Attach.RelativeY=0.
> The same confusion reins when I move the secondary video device to the left
> of the primary monitor. In this case, Attach.RelativeX=0xfffff70 (4294966016)
> and Attach.RelativeY=0xffffff00(4294967040).
>
> Is there some sort of conversion to take into account that I am missing?