lib/Win32Interop/DisplayDevices.cs
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using System;
using System.Runtime.InteropServices; // Source: adapted from https://pinvoke.net/ public class DisplayDevices { // See WinUser.h from Windows SDK for windows internal method definition // See generic win32 error codes for windows internal return val definiion // TODO return actual generic error enum instead of int? find clean way to safe cast it. same goes for other structures [DllImport("User32.dll", CharSet = CharSet.Unicode)] public static extern bool EnumDisplayDevices( [param: MarshalAs(UnmanagedType.LPWStr)] string deviceName, [param: MarshalAs(UnmanagedType.U4)] uint deviceIndex, [In, Out] ref DisplayDevice displayDevice, [param: MarshalAs(UnmanagedType.U4)] EnumDisplayDevicesFlags flags ); [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct DisplayDevice { [MarshalAs(UnmanagedType.U4)] public uint cb; [MarshalAs(UnmanagedType.ByValTStr, SizeConst=32)] public string DeviceName; [MarshalAs(UnmanagedType.ByValTStr, SizeConst=128)] public string DeviceString; [MarshalAs(UnmanagedType.U4)] public DisplayDeviceStateFlags StateFlags; [MarshalAs(UnmanagedType.ByValTStr, SizeConst=128)] public string DeviceID; [MarshalAs(UnmanagedType.ByValTStr, SizeConst=128)] public string DeviceKey; } [Flags] public enum DisplayDeviceStateFlags : int { /// <summary>Specifies whether a monitor is presented as being "on" by the respective GDI view.</summary> DeviceActive = 0x1, /// <summary>The device is the primary display device for the desktop.</summary> PrimaryDevice = 0x4, /// <summary>Represents a pseudo device used to mirror application drawing for remoting or other purposes.</summary> MirroringDriver = 0x8, /// <summary>The device is VGA compatible.</summary> VGACompatible = 0x10, /// <summary>The device is removable; it cannot be the primary display.</summary> Removable = 0x20, /// <summary>The device has more display modes than its output devices support.</summary> ModesPruned = 0x8000000, Remote = 0x4000000, Disconnect = 0x2000000 } [Flags()] public enum EnumDisplayDevicesFlags : uint { None = 0x0, /// <summary>Retrieve the device interface name for GUID_DEVINTERFACE_MONITOR, which is registered by the operating system on a per monitor basis.</summary> GetDeviceInterfaceName = 0x00000001 } } |