怎么用代码来实现用鼠标来拉动窗体的大小
就是当鼠标放在窗体的边缘时改变鼠标的样式.并能来拉动窗体的大小..有急用..请高手指点..在线等
谢谢楼主..不过不是用的你那种方法..代码帖出..与大家共享
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace WindowsApplication19
{
/// <summary>
/// Form3 的摘要说明。
/// </summary>
public class Form3 : System.Windows.Forms.Form
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form3()
{
//
// 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 窗体设计器生成的代码
/// <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()
{
//
// Form3
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 266);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.Name = "Form3";
this.Text = "Form3";
this.Load += new System.EventHandler(this.Form3_Load);
}
#endregion
private const int WM_NCHITTEST = 0x84; //移动鼠标,按住或释放鼠标时发生的系统消息
private const int HTCLIENT = 0x1;//工作区
private const int HTSYSMENU = 3;//系统菜单
private const int HTCAPTION = 0x2; //标题栏
private const int HTLEFT = 10;//向左
private const int HTRIGHT = 11;//向右
private const int HTTOP = 12;//向上
private const int HTTOPLEFT = 13;//向左上
private const int HTTOPRIGHT = 14;//向右上
private const int HTBOTTOM = 15;//向下
private const int HTBOTTOMLEFT = 16;//向左下
private const int HTBOTTOMRIGHT = 17;//向右下
private const int BorderWidth = 5;//自己定义的窗体边的宽度
//可以调整窗体的大小和移动窗体的位置
protected override void WndProc(ref Message m)
{
switch(m.Msg)
{
case WM_NCHITTEST:
base.WndProc(ref m);
if (DesignMode)
{
return;
}
if ((int)m.Result == HTCLIENT)//在客户区
if ((Cursor.Position.X<=this.Left + BorderWidth) && (Cursor.Position.Y <= this.Top + BorderWidth))
m.Result = (IntPtr)HTTOPLEFT;//左上
else if ((Cursor.Position.X>=this.Left + this.Width-BorderWidth) && (Cursor.Position.Y<=this.Top +BorderWidth))
m.Result = (IntPtr)HTTOPRIGHT;//右上
else if ((Cursor.Position.X <= this.Left + BorderWidth) && (Cursor.Position.Y>=this.Top + this.Height-BorderWidth))
m.Result = (IntPtr)HTBOTTOMLEFT;//左下
else if ((Cursor.Position.X>=this.Left + this.Width-BorderWidth) && (Cursor.Position.Y>=this.Top + this.Height-BorderWidth))
m.Result = (IntPtr)HTBOTTOMRIGHT;//右下
else if (Cursor.Position.X<=this.Left + BorderWidth)
m.Result = (IntPtr)HTLEFT;//左
else if (Cursor.Position.X>=this.Left + this.Width-BorderWidth)
m.Result = (IntPtr)HTRIGHT;//右
else if (Cursor.Position.Y<=this.Top + BorderWidth)
m.Result = (IntPtr)HTTOP;//上
else if (Cursor.Position.Y>=this.Top + this.Height-BorderWidth)
m.Result = (IntPtr)HTBOTTOM;//下
else if (Cursor.Position.Y<=this.Top + BorderWidth + 10 )
{
if (Cursor.Position.X<=this.Left + this.Width-BorderWidth + 10)
{
m.Result = (IntPtr)HTSYSMENU;//系统菜单,可以在这里双击鼠标关闭窗体。
}
}
else
m.Result = (IntPtr)HTCAPTION;//移动窗体,双击可以最大化窗体或还原。
return;
default:
base.WndProc(ref m);
break;
}
}
private void Form3_Load(object sender, System.EventArgs e)
{
}
}
}