应该可以用
System.Drawing.Graphics.FromHdc
System.Drawing.Graphics.FromHwnd
来取得Desktop的DC
然后用这个Graphics产生一个Bitmap.
然后调用Bitmap.GetPixel(int x,int y)
Cursor Position可以通过一个Static function
System.Windows.Forms.Cursor.Position()取得.
System.Drawing.Graphics.FromHdc
System.Drawing.Graphics.FromHwnd
来取得Desktop的DC
然后用这个Graphics产生一个Bitmap.
然后调用Bitmap.GetPixel(int x,int y)
Cursor Position可以通过一个Static function
System.Windows.Forms.Cursor.Position()取得.
首先我非常感谢你给我的帮助,但是我还是有点不明白,还请你再帮忙帮忙,
我的问题就是怎么才能获得桌面的DC呢?总不能又是调用GetDC吧?要知道,GETDC这个API转换实在是太麻烦了,由其最后一个参数,转换太长了!!
那是不是用FROMHWND?但是如何获得桌面的HWND?烦请相告,多谢!!!
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace Whatclr
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Timer timer1;
private System.ComponentModel.IContainer components;
Color cr ;
Bitmap MyImage;
int i =0;
IntPtr dc1;
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
private static extern IntPtr CreateDC(
string lpszDriver, // driver name
string lpszDevice, // device name
string lpszOutput, // not used; should be NULL
IntPtr lpInitData // optional printer data
);
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
private static extern Int32 GetPixel(IntPtr hdc,Int32 pointX,Int32 pointY); public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
} /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.timer1 = new System.Windows.Forms.Timer(this.components);
//
// timer1
//
this.timer1.Enabled = true;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackColor = System.Drawing.Color.White;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
} private void timer1_Tick(object sender, System.EventArgs e)
{
Point pt = new Point(Cursor.Position.X,Cursor.Position.Y) ;
//int crWin =GetPixel(dc1,pt.X,pt.Y); //Correct Way to use
//cr = ColorTranslator.FromWin32(crWin);
cr = MyImage.GetPixel(pt.X,pt.Y);
this.Invalidate(); } private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics dc = e.Graphics ;
dc.DrawString(cr.ToString(),this.Font,new SolidBrush(Color.Black),0,i*10);
i++;
} private void Form1_Load(object sender, System.EventArgs e)
{
dc1 = CreateDC("DISPLAY", null, null, (IntPtr)null);
Graphics g1 = Graphics.FromHdc(dc1);
MyImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, g1);
this.BackgroundImage = MyImage; }
}
}
int GetDesktopWindow();
internal extern static IntPtr GetDesktopWindow();
现在我想知道的就是我按照所说blahblah朋友所说的,得不到我想要的东西,那位朋友感兴趣可以回去试试,我的程序目的其实很简单,就是在客户区上写出鼠标所指颜色!!!从我的调试来看,就是所得到的象素点颜色总是空值!!!