場景

效果

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實現(xiàn)

關鍵代碼

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace GetColor {public partial class FrmGetColor : Form{public FrmGetColor(){InitializeComponent();}#region 定義快捷鍵//如果函數(shù)執(zhí)行成功，返回值不為0。??????//如果函數(shù)執(zhí)行失敗，返回值為0。要得到擴展錯誤信息，調(diào)用GetLastError。???????[DllImport("user32.dll", SetLastError = true)]public static extern bool RegisterHotKey(IntPtr hWnd,??????????????? //要定義熱鍵的窗口的句柄???????????int id,???????????????????? //定義熱鍵ID（不能與其它ID重復）??????????????????????KeyModifiers fsModifiers,?? //標識熱鍵是否在按Alt、Ctrl、Shift、Windows等鍵時才會生效????????Keys vk???????????????????? //定義熱鍵的內(nèi)容???????????);[DllImport("user32.dll", SetLastError = true)]public static extern bool UnregisterHotKey(IntPtr hWnd,??????????????? //要取消熱鍵的窗口的句柄???????????int id????????????????????? //要取消熱鍵的ID???????????);//定義了輔助鍵的名稱（將數(shù)字轉(zhuǎn)變?yōu)樽址员阌谟洃?#xff0c;也可去除此枚舉而直接使用數(shù)值）???????[Flags()]public enum KeyModifiers{None = 0,Alt = 1,Ctrl = 2,Shift = 4,WindowsKey = 8}#endregion[DllImport("gdi32.dll")]??static public extern uint GetPixel(IntPtr hDC,int XPos,int YPos);??[DllImport("gdi32.dll")]??static public extern? IntPtr CreateDC(string driverName,string deviceName,string output,IntPtr lpinitData);??[DllImport("gdi32.dll")]??static public extern bool DeleteDC(IntPtr DC);??static public byte GetRValue(uint color)??{??return (byte)color;??}??static public byte GetGValue(uint color)??{??return ((byte)(((short)(color))>>8));??}???static public byte GetBValue(uint color)??{??return ((byte)((color)>>16));??}???static public byte GetAValue(uint color)??{??return ((byte)((color)>>24));??}???public Color GetColor(Point screenPoint)??{??IntPtr displayDC = CreateDC("DISPLAY",null,null,IntPtr.Zero);??uint?? colorref?? =?? GetPixel(displayDC,screenPoint.X,screenPoint.Y);??DeleteDC(displayDC);??byte?? Red?? =?? GetRValue(colorref);??byte?? Green?? =?? GetGValue(colorref);??byte?? Blue?? =?? GetBValue(colorref);??return Color.FromArgb(Red,?? Green,?? Blue);??}??private void FrmGetColor_Load(object sender, EventArgs e){this.TopMost = true;}private void checkBox1_CheckedChanged(object sender, EventArgs e){if (checkBox1.Checked == true){this.TopMost = true;}else{this.TopMost = false;}}private void timer1_Tick(object sender, EventArgs e){txtPoint.Text=Control.MousePosition.X.ToString()+","+Control.MousePosition.Y.ToString();Point pt = new Point(Control.MousePosition.X, Control.MousePosition.Y);Color cl = GetColor(pt);panel1.BackColor = cl;txtRGB.Text = cl.R + "," + cl.G + "," + cl.B;txtColor.Text = ColorTranslator.ToHtml(cl).ToString();RegisterHotKey(Handle, 81, KeyModifiers.Ctrl, Keys.F);}private void button1_Click(object sender, EventArgs e){Application.Exit();}protected override void WndProc(ref Message m){const int WM_HOTKEY = 0x0312;//按快捷鍵????switch (m.Msg){case WM_HOTKEY:switch (m.WParam.ToInt32()){case 81:??? //按下的是CTRL+F????Clipboard.SetText(txtColor.Text.Trim());break;}break;}base.WndProc(ref m);}private void FrmGetColor_Leave(object sender, EventArgs e){}private void FrmGetColor_FormClosed(object sender, FormClosedEventArgs e){//注銷Id號為81的熱鍵設定???UnregisterHotKey(Handle, 81);}} }

程序與代碼下載

公眾號“霸道的程序猿”發(fā)送“顏色拾取器”

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