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下面的代码实现修改显示器分辨率和刷新频率的功能：
<![CDATA[using System;<br />
using System.Drawing;<br />
using System.Collections;<br />
using System.ComponentModel;<br />
using System.Windows.Forms;<br />
using System.Data;<br />
using System.Runtime.InteropServices;</p>
<p>namespace ScreenResolution<br />
{</p>
<p> public class Form1 : System.Windows.Forms.Form<br />
{<br />
public enum DMDO<br />
{<br />
DEFAULT = 0,<br />
D90 = 1,<br />
D180 = 2,<br />
D270 = 3<br />
}</p>
<p> [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]<br />
struct DEVMODE<br />
{<br />
public const int DM_DISPLAYFREQUENCY = 0x400000;<br />
public const int DM_PELSWIDTH = 0x80000;<br />
public const int DM_PELSHEIGHT = 0x100000;<br />
private const int CCHDEVICENAME = 32;<br />
private const int CCHFORMNAME = 32;</p>
<p> [MarshalAs(UnmanagedType.ByValTStr, SizeConst=CCHDEVICENAME)]<br />
public string dmDeviceName;<br />
public short dmSpecVersion;<br />
public short dmDriverVersion;<br />
public short dmSize;<br />
public short dmDriverExtra;<br />
public int dmFields;</p>
<p> public int dmPositionX;<br />
public int dmPositionY;<br />
public DMDO dmDisplayOrientation;<br />
public int dmDisplayFixedOutput;</p>
<p> public short dmColor;<br />
public short dmDuplex;<br />
public short dmYResolution;<br />
public short dmTTOption;<br />
public short dmCollate;<br />
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=CCHFORMNAME)]<br />
public string dmFormName;<br />
public short dmLogPixels;<br />
public int dmBitsPerPel;<br />
public int dmPelsWidth;<br />
public int dmPelsHeight;<br />
public int dmDisplayFlags;<br />
public int dmDisplayFrequency;<br />
public int dmICMMethod;<br />
public int dmICMIntent;<br />
public int dmMediaType;<br />
public int dmDitherType;<br />
public int dmReserved1;<br />
public int dmReserved2;<br />
public int dmPanningWidth;<br />
public int dmPanningHeight;<br />
}</p>
<p> [DllImport("user32.dll", CharSet=CharSet.Auto)]<br />
//static extern int ChangeDisplaySettings( DEVMODE lpDevMode, int dwFlags);</p>
<p> static extern int ChangeDisplaySettings( [In] ref DEVMODE lpDevMode, int dwFlags);<br />
private System.ComponentModel.Container components = null;<br />
public Form1()<br />
{<br />
InitializeComponent();<br />
}<br />
protected override void Dispose( bool disposing )<br />
{<br />
if( disposing )<br />
{<br />
if (components != null)<br />
{<br />
components.Dispose();<br />
}<br />
}<br />
base.Dispose( disposing );<br />
}</p>
<p> #region Windows Form Designer generated code<br />
private void InitializeComponent()<br />
{<br />
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);<br />
this.ClientSize = new System.Drawing.Size(292, 273);<br />
this.Text = "改变屏幕分辨率的例子";</p>
<p> }<br />
#endregion</p>
<p> static void Main()<br />
{<br />
Form1 r = new Form1();<br />
r.ChangeRes();<br />
Application.Run(new Form1());<br />
}</p>
<p> void ChangeRes()<br />
{<br />
Form1 t = new Form1();<br />
long RetVal=0;<br />
DEVMODE dm = new DEVMODE();<br />
dm.dmSize= (short)Marshal.SizeOf(typeof(DEVMODE));<br />
dm.dmPelsWidth = 1024;<br />
dm.dmPelsHeight= 768;<br />
dm.dmDisplayFrequency=85;<br />
dm.dmFields = DEVMODE.DM_PELSWIDTH | DEVMODE.DM_PELSHEIGHT | DEVMODE.DM_DISPLAYFREQUENCY;<br />
RetVal = ChangeDisplaySettings(ref dm, 0);<br />
}<br />
}<br />
}<br />
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