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关键代码
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
[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;
//按快捷键
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)
{
//注销id号为81的热键设定
unregisterhotkey(handle, 81);
}
}
}
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