Chip:

The main screen will have a top left coordinate of 0;0. 

Then get the coordinates of each screen.
You can then determine where each screen is.

A horizontal negative value means the screen is to the left of the main screen.
A vertical negative value means the screen is above the main screen. 

Of course above and below are virtual directions based on how the user has set 
up the screens in the OS.

From the Count Screens, and Screen coordinates you can then determine the edges 
of each screen and their logical position.

Jody
ARGUS Productions Inc.

> On Aug 9, 2019, at 10:52 AM, Chip Scheide via 4D_Tech <[email protected]> 
> wrote:
> 
> In a situation where there are 2 or more screens attached to a computer.
> is there any way to determine the screen arrangement? (horizontal, 
> vertical, grid)
> 
> In a 2 or more horizontal
> which screen is main (left, right, other)
> 
> In a 2 or more vertical
> which screen is main (Top, bottom other)
> 
> in a grid (4 or more) with at least 2 vertical and at least 2 
> horizontal)
> which screen in main?
> 
> Thanks
> Chip
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