Swap Primary Monitors (for 2 monitor setups)

Return to DisplayFusion Scripted Functions (Macros)

Description	This script will make the opposite monitor Primary in 2 monitor setups.
Language	C# (.Net)
Minimum Version	7.2.0+
Created By	MaoYanwen298975
Contributors	-
Date Created	May 13, 2015
Date Last Modified	May 13, 2015

Scripted Function (Macro) Code

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using System.IO; using System.Runtime.InteropServices; using System.Text; using System; using System.Drawing; using System.Windows.Forms; public static class DisplayFusionFunction { public static void Run(IntPtr windowHandle) { //find a screen that isn't the primary screen Screen unPrimary = null; foreach (Screen screen in Screen.AllScreens) { if (screen.Primary) continue; unPrimary = screen; break; } //if this is null, the computer only has one screen if (unPrimary == null) return; ScreenHelper.SwitchPrimaryScreen(unPrimary, Screen.PrimaryScreen); } } public class WinApi { public const Int32 CCHDEVICENAME = 32; public const Int32 CCHFORMNAME = 32; public enum DEVMODE_SETTINGS { ENUM_CURRENT_SETTINGS = (-1), ENUM_REGISTRY_SETTINGS = (-2) } [Flags()] public enum DisplayDeviceStateFlags : int { AttachedToDesktop = 0x1, MultiDriver = 0x2, PrimaryDevice = 0x4, MirroringDriver = 0x8, VGACompatible = 0x10, Removable = 0x20, ModesPruned = 0x8000000, Remote = 0x4000000, Disconnect = 0x2000000 } public enum Display_Device_Stateflags { DISPLAY_DEVICE_ATTACHED_TO_DESKTOP = 0x1, DISPLAY_DEVICE_MIRRORING_DRIVER = 0x8, DISPLAY_DEVICE_MODESPRUNED = 0x8000000, DISPLAY_DEVICE_MULTI_DRIVER = 0x2, DISPLAY_DEVICE_PRIMARY_DEVICE = 0x4, DISPLAY_DEVICE_VGA_COMPATIBLE = 0x10 } public enum DeviceFlags { CDS_FULLSCREEN = 0x4, CDS_GLOBAL = 0x8, CDS_NORESET = 0x10000000, CDS_RESET = 0x40000000, CDS_SET_PRIMARY = 0x10, CDS_TEST = 0x2, CDS_UPDATEREGISTRY = 0x1, CDS_VIDEOPARAMETERS = 0x20, } public enum DEVMODE_Flags { DM_BITSPERPEL = 0x40000, DM_DISPLAYFLAGS = 0x200000, DM_DISPLAYFREQUENCY = 0x400000, DM_PELSHEIGHT = 0x100000, DM_PELSWIDTH = 0x80000, DM_POSITION = 0x20 } public enum DisplaySetting_Results { DISP_CHANGE_BADFLAGS = -4, DISP_CHANGE_BADMODE = -2, DISP_CHANGE_BADPARAM = -5, DISP_CHANGE_FAILED = -1, DISP_CHANGE_NOTUPDATED = -3, DISP_CHANGE_RESTART = 1, DISP_CHANGE_SUCCESSFUL = 0 } [StructLayout(LayoutKind.Sequential)] public struct POINTL { [MarshalAs(UnmanagedType.I4)] public int x; [MarshalAs(UnmanagedType.I4)] public int y; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] public struct DEVMODE { [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string dmDeviceName; [MarshalAs(UnmanagedType.U2)] public UInt16 dmSpecVersion; [MarshalAs(UnmanagedType.U2)] public UInt16 dmDriverVersion; [MarshalAs(UnmanagedType.U2)] public UInt16 dmSize; [MarshalAs(UnmanagedType.U2)] public UInt16 dmDriverExtra; [MarshalAs(UnmanagedType.U4)] public DEVMODE_Flags dmFields; public POINTL dmPosition; [MarshalAs(UnmanagedType.U4)] public UInt32 dmDisplayOrientation; [MarshalAs(UnmanagedType.U4)] public UInt32 dmDisplayFixedOutput; [MarshalAs(UnmanagedType.I2)] public Int16 dmColor; [MarshalAs(UnmanagedType.I2)] public Int16 dmDuplex; [MarshalAs(UnmanagedType.I2)] public Int16 dmYResolution; [MarshalAs(UnmanagedType.I2)] public Int16 dmTTOption; [MarshalAs(UnmanagedType.I2)] public Int16 dmCollate; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string dmFormName; [MarshalAs(UnmanagedType.U2)] public UInt16 dmLogPixels; [MarshalAs(UnmanagedType.U4)] public UInt32 dmBitsPerPel; [MarshalAs(UnmanagedType.U4)] public UInt32 dmPelsWidth; [MarshalAs(UnmanagedType.U4)] public UInt32 dmPelsHeight; [MarshalAs(UnmanagedType.U4)] public UInt32 dmDisplayFlags; [MarshalAs(UnmanagedType.U4)] public UInt32 dmDisplayFrequency; [MarshalAs(UnmanagedType.U4)] public UInt32 dmICMMethod; [MarshalAs(UnmanagedType.U4)] public UInt32 dmICMIntent; [MarshalAs(UnmanagedType.U4)] public UInt32 dmMediaType; [MarshalAs(UnmanagedType.U4)] public UInt32 dmDitherType; [MarshalAs(UnmanagedType.U4)] public UInt32 dmReserved1; [MarshalAs(UnmanagedType.U4)] public UInt32 dmReserved2; [MarshalAs(UnmanagedType.U4)] public UInt32 dmPanningWidth; [MarshalAs(UnmanagedType.U4)] public UInt32 dmPanningHeight; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] public struct DISPLAY_DEVICE { [MarshalAs(UnmanagedType.U4)] public int 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; } public class User_32 { [DllImport("user32.dll")] public static extern int ChangeDisplaySettingsEx(string lpszDeviceName, [In] ref DEVMODE lpDevMode, IntPtr hwnd, int dwFlags, IntPtr lParam); } } public class ScreenHelper { public static void SwitchPrimaryScreen(Screen newPrimary, Screen oldPrimary) { MoveOldPrimary(newPrimary, oldPrimary); MoveNewPrimary(newPrimary, oldPrimary); CommitChange(newPrimary, oldPrimary); } private static void MoveOldPrimary(Screen newPrimary, Screen oldPrimary) { WinApi.DEVMODE ndm3 = NewDevMode(); ndm3.dmFields = WinApi.DEVMODE_Flags.DM_POSITION; ndm3.dmPosition.x = newPrimary.Bounds.Width; ndm3.dmPosition.y = 0; WinApi.User_32.ChangeDisplaySettingsEx(oldPrimary.DeviceName, ref ndm3, (IntPtr)null, (int)WinApi.DeviceFlags.CDS_UPDATEREGISTRY | (int)WinApi.DeviceFlags.CDS_NORESET, IntPtr.Zero); } private static void MoveNewPrimary(Screen newPrimary, Screen oldPrimary) { WinApi.DEVMODE ndm4 = NewDevMode(); ndm4.dmFields = WinApi.DEVMODE_Flags.DM_POSITION; ndm4.dmPosition.x = 0; ndm4.dmPosition.y = 0; WinApi.User_32.ChangeDisplaySettingsEx(newPrimary.DeviceName, ref ndm4, (IntPtr)null, (int)WinApi.DeviceFlags.CDS_SET_PRIMARY | (int)WinApi.DeviceFlags.CDS_UPDATEREGISTRY | (int)WinApi.DeviceFlags.CDS_NORESET, IntPtr.Zero); } private static void CommitChange(Screen newPrimary, Screen oldPrimary) { WinApi.DEVMODE ndm5 = NewDevMode(); WinApi.User_32.ChangeDisplaySettingsEx(oldPrimary.DeviceName, ref ndm5, (IntPtr)null, (int)WinApi.DeviceFlags.CDS_UPDATEREGISTRY, (IntPtr)null); WinApi.DEVMODE ndm6 = NewDevMode(); WinApi.User_32.ChangeDisplaySettingsEx(newPrimary.DeviceName, ref ndm6, (IntPtr)null, (int)WinApi.DeviceFlags.CDS_SET_PRIMARY | (int)WinApi.DeviceFlags.CDS_UPDATEREGISTRY, IntPtr.Zero); } private static WinApi.DEVMODE NewDevMode() { WinApi.DEVMODE dm = new WinApi.DEVMODE(); dm.dmDeviceName = new String(new char[31]); dm.dmFormName = new String(new char[31]); dm.dmSize = (ushort)Marshal.SizeOf(dm); return dm; } }