WinForm 求教怎么捕获窗口外的鼠标事件 SetCapture
我有一个模态对话框想在鼠标点击窗口外的地方时执行一段代码
var form=new Form1();
form.showDialog();

有人说用 SetCapture();

我在form中加了SetCapture(this) 后该怎么做
WndProc(ref Message m) 里还是得不到鼠标的消息


[最优解释]

        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();

        [DllImport("user32.dll")]
        public static extern IntPtr SetCapture(IntPtr h);

        private void Form2_Load(object sender, EventArgs e)
        {
            SetCapture(this.Handle);
        }

        private void Form2_FormClosing(object sender, FormClosingEventArgs e)
        {
            ReleaseCapture();
        }

        private void Form2_MouseUp(object sender, MouseEventArgs e)
        {
            Close();
        }

[其他解释]
这次好像粘错代码了


[其他解释]

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();

        [DllImport("user32.dll")]
        public static extern IntPtr SetCapture(IntPtr h);

        private readonly Int32 WM_LBUTTONUP = 0x202;

        private void Form1_Load(object sender, EventArgs e)
        {
            SetCapture(this.Handle);
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            ReleaseCapture();
        }

        protected override void WndProc(ref Message m) 
 
        {
            if (m.Msg == WM_LBUTTONUP)
            {
                ReleaseCapture();
                MessageBox.Show("你要执行的代码");                
                SetCapture(this.Handle);
                return;
            }

            base.WndProc(ref m);
        }
    }
}

[其他解释]
十分感谢 不过要在窗体内部执行 base.WndProc(ref m)后 在外部点击没有效果了 估计系统自己 ReleaseCapture()了。 在 base.WndProc(ref m)加上 SetCapture(this.Handle);也不管用
是不是得把句柄替换成内部控件的，正在想办法


protected override void WndProc(ref Message m)
{


if (m.Msg == WM_LBUTTONUP)
{
// ReleaseCapture();
Point p = new Point((int)m.LParam);
if (this.ClientRectangle.Contains(p))
{
base.WndProc(ref m);
//SetCapture(this.Handle)
}else
{
ReleaseCapture();
SetCapture(this.Handle);
foo(p);
}

}else
{
base.WndProc(ref m);
//SetCapture(this.Handle)
}

}

引用:

C# code
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
……

[其他解释]
不明觉厉



[其他解释]
遇到一个问题在窗体内部的控件的事件得不到响应了，比如窗体上的 按钮的点击没反应，文本框的不到焦点

protected override void WndProc(ref Message m)
{


if (m.Msg == WM_LBUTTONUP)
{
// ReleaseCapture();
Point p = new Point((int)m.LParam);
if (this.ClientRectangle.Contains(p))
{
base.WndProc(ref m);
//SetCapture(this.Handle)
}else
{
ReleaseCapture();
SetCapture(this.Handle);
foo(p);
}

}else
{
base.WndProc(ref m);
//SetCapture(this.Handle)
}


}
[其他解释]
写在lostfocus里。