C#中改变显示器的分辨率

C#中改变显示器的分辨率

作者： 孟宪会 出自： 【孟宪会之精彩世界】 发布日期： 2003-7-24 17:35:01

下面的代码实现修改显示器分辨率和刷新频率的功能：

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Runtime.InteropServices;

namespace ScreenResolution

{

public class Form1 : System.Windows.Forms.Form

{

public enum DMDO

{

DEFAULT = 0,

D90 = 1,

D180 = 2,

D270 = 3

}

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]

struct DEVMODE

{

public const int DM_DISPLAYFREQUENCY = 0x400000;

public const int DM_PELSWIDTH = 0x80000;

public const int DM_PELSHEIGHT = 0x100000;

private const int CCHDEVICENAME = 32;

private const int CCHFORMNAME = 32;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst=CCHDEVICENAME)]

public string dmDeviceName;

public short dmSpecVersion;

public short dmDriverVersion;

public short dmSize;

public short dmDriverExtra;

public int dmFields;

public int dmPositionX;

public int dmPositionY;

public DMDO dmDisplayOrientation;

public int dmDisplayFixedOutput;

public short dmColor;

public short dmDuplex;

public short dmYResolution;

public short dmTTOption;

public short dmCollate;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst=CCHFORMNAME)]

public string dmFormName;

public short dmLogPixels;

public int dmBitsPerPel;

public int dmPelsWidth;

public int dmPelsHeight;

public int dmDisplayFlags;

public int dmDisplayFrequency;

public int dmICMMethod;

public int dmICMIntent;

public int dmMediaType;

public int dmDitherType;

public int dmReserved1;

public int dmReserved2;

public int dmPanningWidth;

public int dmPanningHeight;

}

[DllImport("user32.dll", CharSet=CharSet.Auto)]

//static extern int ChangeDisplaySettings( DEVMODE lpDevMode, int dwFlags);

static extern int ChangeDisplaySettings( [In] ref DEVMODE lpDevMode, int dwFlags);

private System.ComponentModel.Container components = null;

public Form1()

{

InitializeComponent();

}

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose( disposing );

}

#region Windows Form Designer generated code

private void InitializeComponent()

{

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(292, 273);

this.Text = "改变屏幕分辨率的例子";

}

#endregion

static void Main()

{

Form1 r = new Form1();

r.ChangeRes();

Application.Run(new Form1());

}

void ChangeRes()

{

Form1 t = new Form1();

long RetVal=0;

DEVMODE dm = new DEVMODE();

dm.dmSize= (short)Marshal.SizeOf(typeof(DEVMODE));

dm.dmPelsWidth = 1024;

dm.dmPelsHeight= 768;

dm.dmDisplayFrequency=85;

dm.dmFields = DEVMODE.DM_PELSWIDTH | DEVMODE.DM_PELSHEIGHT | DEVMODE.DM_DISPLAYFREQUENCY;

RetVal = ChangeDisplaySettings(ref dm, 0);

}

}

}