c# winform 窗体最小化和最大化控件简单封装（SkinsDLL）。

后续再继续新增功能
直接上代码：
namespace SkinsDll
{
    public partial class bgTopControl : UserControl
    {
        public bool SetMove = true;//是否可移动
        private bool capture = false;
        private bool ismax = false;
        private Point position;
        /// <summary>
        /// 记录该控件最顶级的父类（Form）
        /// </summary>
        private Form _ParentForm = null;
        /// <summary>
        /// 设置窗体
        /// </summary>
        public Form ParentFm
        {
            get
            {
                return _ParentForm;
            }
            set
            {
                _ParentForm = value;
            }
        }

        private bool _IsGC = false;
        /// <summary>
        /// 是否进行垃圾回收
        /// </summary>
        public bool IsGC 
        {
            get
            {
                return _IsGC;
            }
            set
            {
                _IsGC = value;
            }
        }

        public bgTopControl()
        {
            InitializeComponent();
            SetCtrlMove(this);
        }

        private void SetCtrlMove(Control Pctrl)
        {
            foreach (object var in Pctrl.Controls)
            {
                ((Control)var).DoubleClick += new EventHandler(ctl_DoubleClick);
                ((Control)var).Click += new EventHandler(ctl_Click);
            }
        }
        /// <summary>
        /// 继承基类的单击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ctl_Click(object sender, EventArgs e)
        {
            base.OnClick(e);
        }

        private void ctl_DoubleClick(object sender, EventArgs e)
        {
            base.OnDoubleClick(e);
        }

        private void bgTopControl_MouseUp(object sender, MouseEventArgs e)
        {
            if (SetMove)
            {
                capture = false;
            }
        }

        private void bgTopControl_MouseMove(object sender, MouseEventArgs e)
        {
            if (SetMove)
            {
                try
                {
                    if (e.Button == MouseButtons.Right)
                        return;

                    if (capture && _ParentForm != null)
                    {
                        this._ParentForm.Location = new Point(e.X + this._ParentForm.Left - position.X, e.Y + this._ParentForm.Top - position.Y);
                    }
                }
                catch { }
            }
        }

        private void bgTopControl_MouseDown(object sender, MouseEventArgs e)
        {
            if (SetMove)
            {
                if (e.Button != MouseButtons.Left)
                    return;
                position = new Point(e.X, e.Y);
                capture = true;
            }
        }

        private void bgtoppanel_DoubleClick(object sender, EventArgs e)
        {
            if (_ParentForm == null)
            {
                return;
            }
            if (ismax == false)
            {
                _ParentForm.WindowState = FormWindowState.Maximized;
                ismax = true;
            }
            else
            {
                _ParentForm.WindowState = FormWindowState.Normal;
                ismax = false;
            }
            this.Width = _ParentForm.Width - 10;

            //this.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top & System.Windows.Forms.AnchorStyles.Right & System.Windows.Forms.AnchorStyles.Left)));
        }


        private void minpicbox_MouseMove(object sender, MouseEventArgs e)
        {
            minpicbox.BackgroundImage = global::SkinsDll.Properties.Resources.MainMinMove;
        }

        private void minpicbox_MouseLeave(object sender, EventArgs e)
        {
            minpicbox.BackgroundImage = global::SkinsDll.Properties.Resources.MainMin;
        }

        private void closepicbox_MouseMove(object sender, MouseEventArgs e)
        {
            closepicbox.BackgroundImage = global::SkinsDll.Properties.Resources.MainExitMove;
        }

        private void closepicbox_MouseLeave(object sender, EventArgs e)
        {
            closepicbox.BackgroundImage = global::SkinsDll.Properties.Resources.MainExit;
        }

        private void bgtoppanel_MouseDown(object sender, MouseEventArgs e)
        {
            if (SetMove)
            {
                if (e.Button != MouseButtons.Left)
                    return;
                position = new Point(e.X, e.Y);
                capture = true;
            }
        }

        private void bgtoppanel_MouseMove(object sender, MouseEventArgs e)
        {
            if (SetMove)
            {
                try
                {
                    if (e.Button == MouseButtons.Right)
                        return;

                    if (capture && _ParentForm != null)
                    {
                        this._ParentForm.Location = new Point(e.X + this._ParentForm.Left - position.X, e.Y + this._ParentForm.Top - position.Y);
                    }
                }
                catch { }
            }
        }

        private void bgtoppanel_MouseUp(object sender, MouseEventArgs e)
        {
            if (SetMove)
            {
                capture = false;
            }
        }

        private void closepicbox_Click(object sender, EventArgs e)
        {
            if (_ParentForm != null && _IsGC)
            {
                System.GC.Collect();
            }
            _ParentForm.Close();
        }

        private void minpicbox_Click(object sender, EventArgs e)
        {
            if (_ParentForm != null)
            {
                _ParentForm.WindowState = FormWindowState.Minimized;
            }
        }
    }
}

最后的效果图：

 

 

这样以后就可以直接用这个控件了，来回双击该控件，可以切换最大化到原始大小。