实现鼠标移动到某处后放大效果，类似Windows放大镜
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
#region 定义快捷键
//如果函数执行成功，返回值不为0。
//如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。
[DllImport("user32.dll", SetLastError = true)]
public static extern bool RegisterHotKey(
IntPtr hWnd, //要定义热键的窗口的句柄
int id, //定义热键ID（不能与其它ID重复）
KeyModifiers fsModifiers, //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效
Keys vk //定义热键的内容
);
[DllImport("user32.dll", SetLastError = true)]
public static extern bool UnregisterHotKey(
IntPtr hWnd, //要取消热键的窗口的句柄
int id //要取消热键的ID
);
//定义了辅助键的名称（将数字转变为字符以便于记忆，也可去除此枚举而直接使用数值）
[Flags()]
public enum KeyModifiers
{
None = 0,
Alt = 1,
Ctrl = 2,
Shift = 4,
WindowsKey = 8
}
#endregion
#region 获取鼠标像素的RGB
[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);
}
#endregion
int screenWidth; //屏幕宽度
int screenHeight; //屏幕高度
int mx; //鼠标x坐标
int my; //鼠标y坐标
const int imgWidth = 234;//放大后图片的宽度
const int imgHeight = 134;//放大后图片的高度
private void Form1_Load(object sender, EventArgs e)
{
this.Location = new Point(0,0);
screenWidth = Screen.PrimaryScreen.WorkingArea.Width;
screenHeight = Screen.PrimaryScreen.WorkingArea.Height;
this.TopMost = true;
}
private void timer1_Tick(object sender, EventArgs e)
{
RegisterHotKey(Handle, 81, KeyModifiers.None, Keys.Escape);
mx = Control.MousePosition.X;
my = Control.MousePosition.Y;
lblmPos.Text="(" mx.ToString() "," my.ToString() ")";
Point pt = new Point(mx,my);
Color cl = GetColor(pt);
lblRGB.Text = "(" cl.R.ToString() "," cl.G.ToString() "," cl.B ")";
if (mx <= this.Width&&my<=this.Height)
{
this.Location = new Point(screenWidth-this.Width,0);
}
if (mx >= screenWidth - this.Width&&my<=this.Height)
{
this.Location = new Point(0,0);
}
Bitmap bt = new Bitmap(imgWidth/2,imgHeight/2);
Graphics g = Graphics.FromImage(bt);
g.CopyFromScreen(new Point(Cursor.Position.X-imgWidth/4,Cursor.Position.Y-imgHeight/4),new Point(0,0),new Size(imgWidth/2,imgHeight/2));
IntPtr dc1 = g.GetHdc();
g.ReleaseHdc(dc1);
pictureBox1.Image = (Image)bt;
}
protected override void WndProc(ref Message m)
{
const int WM_HOTKEY = 0x0312;
//按快捷键
switch (m.Msg)
{
case WM_HOTKEY:
switch (m.WParam.ToInt32())
{
case 81: //按下的是ESC
Application.Exit();
break;
}
break;
}
base.WndProc(ref m);
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
//注销Id号为81的热键设定
UnregisterHotKey(Handle, 81);
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
g.DrawLine(new Pen(Color.Red), new PointF(pictureBox1.Width / 2, 0), new PointF(pictureBox1.Width / 2,pictureBox1.Height));
g.DrawLine(new Pen(Color.Red,2), new PointF(0, pictureBox1.Height / 2), new PointF(pictureBox1.Width, pictureBox1.Height/2));
}
}资源文件列表
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass.sln , 941
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass.suo , 9216
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/bg.bmp , 273832
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/bin/Debug/ScreenBlowupGlass.exe , 372224
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/bin/Debug/ScreenBlowupGlass.pdb , 36352
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/bin/Debug/ScreenBlowupGlass.vshost.exe , 14328
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/bin/Debug/ScreenBlowupGlass.vshost.exe.manifest , 490
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Form1.cs , 6049
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Form1.Designer.cs , 6540
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Form1.resx , 6008
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/obj/Debug/ScreenBlowupGlass.csproj.FileListAbsolute.txt , 2559
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/obj/Debug/ScreenBlowupGlass.csproj.GenerateResource.Cache , 899
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/obj/Debug/ScreenBlowupGlass.exe , 372224
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/obj/Debug/ScreenBlowupGlass.Form1.resources , 180
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/obj/Debug/ScreenBlowupGlass.pdb , 36352
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/obj/Debug/ScreenBlowupGlass.Properties.Resources.resources , 303427
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/obj/Debug/TempPE/Properties.Resources.Designer.cs.dll , 5120
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Program.cs , 498
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Properties/AssemblyInfo.cs , 1388
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Properties/Resources.Designer.cs , 3345
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Properties/Resources.resx , 6405
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Properties/Settings.Designer.cs , 1102
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/Properties/Settings.settings , 249
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/ScreenBlowupGlass.csproj , 3971
╞┴─╗╖┼┤≤╛╡/ScreenBlowupGlass/═╝▒Ω.ico , 55406