C#: Get complete desktop size?

user_33225 0
Viewed 86093

How do I find out the size of the entire desktop? Not the "working area" and not the "screen resolution", both of which refer to only one screen. I want to find out the total width and height of the virtual desktop of which each monitor is showing only a part.

screen-resolution desktop screen .net c#
11 Answers

Get the Size of a virtual display without any dependencies

public enum SystemMetric
{
    VirtualScreenWidth = 78, // CXVIRTUALSCREEN 0x0000004E 
    VirtualScreenHeight = 79, // CYVIRTUALSCREEN 0x0000004F 
}

[DllImport("user32.dll")]
public static extern int GetSystemMetrics(SystemMetric metric);

public static Size GetVirtualDisplaySize()
{
    var width = GetSystemMetrics(SystemMetric.VirtualScreenWidth);
    var height = GetSystemMetrics(SystemMetric.VirtualScreenHeight);

    return new Size(width, height);
}
user_47922210

Values, derived from SM_XVIRTUALSCREEN and so on are physical coordinates and not equals to logical coordinates at screen scaling 125%, 150%, 175% in Control Panel.

user_100363700

You'll find that many window manipulations are not yet available or may not ever be made available. I've had the greatest success with PInvoke.User32 nuget package.

var screenX = PInvoke.User32.GetSystemMetrics(PInvoke.User32.SystemMetric.SM_CXSCREEN);
var screenY = PInvoke.User32.GetSystemMetrics(PInvoke.User32.SystemMetric.SM_CYSCREEN);
user_20045320
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