再看主窗体

窗体加载

 base.OnLoad(e);
            try
            {
                if (Settings.Default.skinColor != null)
                {
                    this.BackColor = Settings.Default.skinColor;
                    MyFormTemp.CurrentBackgroundColor = Settings.Default.skinColor;
                }
                if (Settings.Default.skinPic != null)
                {
                    if (File.Exists(Settings.Default.skinPic))
                    {
                        FileStream fs=new FileStream(Settings.Default.skinPic,FileMode.Open);
                        this.BackgroundImage = Image.FromStream(fs);
                        fs.Close();
                        MyFormTemp.CurrentBackgroundImage = this.BackgroundImage;
                    }
                }
            }
            catch
            {  }
            skinForm.ColorChanged += new SkinForm.ColorChangedEventHandler(skinPanel_ColorChanged);
            skinForm.SkinFileChanged += new SkinForm.SkinFileChangedEventHandler(skinPanel_SkinFileChanged);
            Control c = this.Controls.Find("ButtonMin",true)[0];
            this.ButtonMenu.Left = c.Left - ButtonMenu.Width;
            this.ButtonSkin.Left = ButtonMenu.Left - ButtonSkin.Width;

            skinForm.OpacityFileChanged += new SkinForm.OpacityChangedEventHandler(skinForm_OpacityFileChanged);

里面有一些事件,是换肤的，在之后的章节中给出

方法

 private void ButtonSkin_Click(object sender, EventArgs e)
        {
            if (skinForm.Visible == false)
            {
                skinForm.Visible = true;
                skinForm.Left =this.Left+ this.ButtonSkin.Left + this.ButtonSkin.Width - 365;
                skinForm.Top =this.Top+ this.ButtonSkin.Top + this.ButtonSkin.Height;
                skinForm.BringToFront();
                skinForm.Focus();
               
            }
            else
            {
                skinForm.Visible = false;
            }
        }

       
        public virtual void skinPanel_SkinFileChanged(string filePath)
        {
            if (File.Exists(filePath))
            {
                
                FileStream fs = new FileStream(filePath,FileMode.Open);
                Image img = Image.FromStream(fs);
                fs.Close();
                    this.BackgroundImage = img;
                    this.BackgroundImageLayout = MyFormTemp.CurrentImageLayout;
                    MyFormTemp.CurrentBackgroundImage = this.BackgroundImage;
                   // this.childForm.BackgroundImage = this.BackgroundImage;
                    try
                    {
                        Settings.Default.skinPic = filePath;
                        Settings.Default.Save();
                    }
                    catch { }
            }
        }

        public virtual void skinPanel_ColorChanged(HSLColor hsl, Color color)
        {
            this.BackgroundImage = null;
            this.BackColor = color;
            try
            {
                Settings.Default.skinColor = color;
                Settings.Default.skinPic = null;
                Settings.Default.Save();
            }
            catch { }
          //  this.childForm.BackColor = color;
            //this.childForm.BackgroundImage = null;
            MyFormTemp.CurrentBackgroundColor = color;
            MyFormTemp.CurrentBackgroundImage = null;
        }

重绘

  protected override void DrawBackground(PaintEventArgs e)
        {
            BufferedGraphicsContext currentContext = BufferedGraphicsManager.Current;
            BufferedGraphics myBuffer = currentContext.Allocate(e.Graphics, e.ClipRectangle);
            Graphics g = myBuffer.Graphics;
            g.Clear(this.BackColor);

            if (this.BackgroundImage != null)
            {
                g.DrawImage(this.BackgroundImage,new Rectangle(0,0,this.Width,this.Height));
            }
            int titleHeight = 130;
            Bitmap Bmp = global::FYJ.Winform.Properties.Resources.main_form_bg;

            g.DrawImage(Bmp, new Rectangle(0, 0, 5, titleHeight), 0, 0, 5, titleHeight, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(5, 0, this.Width - 10, titleHeight), 5, 0, Bmp.Width - 10, titleHeight, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(this.Width - 5, 0, 5, titleHeight), Bmp.Width - 5, 0, 5, titleHeight, GraphicsUnit.Pixel);

            g.DrawImage(Bmp, new Rectangle(0, titleHeight, 2, 25), 0, titleHeight, 2, 25, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(2, titleHeight, this.Width - 4, 25), 2, titleHeight, 5, 25, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(this.Width - 2, titleHeight, 2, 25), Bmp.Width - 2, titleHeight, 2, 25, GraphicsUnit.Pixel);

            g.DrawImage(Bmp, new Rectangle(0, titleHeight + 25, 5, Height - titleHeight - 34 - 25), 0, titleHeight + 25, 5, Bmp.Height - 34 - 25 - titleHeight - 20, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(5, titleHeight + 25, this.Width - 10, Height - titleHeight - 34 - 25), 5, titleHeight + 25, Bmp.Width - 10, Bmp.Height - 34 - 25 - titleHeight - 20, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(this.Width - 5, titleHeight + 25, 5, Height - titleHeight - 34 - 25), Bmp.Width - 5, titleHeight + 25, 5, Bmp.Height - 34 - 25 - titleHeight - 20, GraphicsUnit.Pixel);

            //底部
            g.DrawImage(Bmp, new Rectangle(0, this.Height - 34, 5, 34), 0, Bmp.Height - 34, 5, 34, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(5, this.Height - 34, this.Width - 10, 34), 5, Bmp.Height - 34, Bmp.Width - 10, 34, GraphicsUnit.Pixel);
            g.DrawImage(Bmp, new Rectangle(this.Width - 5, this.Height - 34, 5, 34), Bmp.Width - 5, Bmp.Height - 34, 5, 34, GraphicsUnit.Pixel);
            int strX = 10;
            if (this.ShowIcon)
            {
                strX = 30;
                g.DrawIcon(Icon, new Rectangle(8, 7, 16, 16));
            }
            if (!String.IsNullOrEmpty(this.Text))
            {
                g.DrawString(this.Text, new Font("宋体", 11F, FontStyle.Regular), Brushes.WhiteSmoke, strX, 8);
            }
            Bmp.Dispose();

            myBuffer.Render(e.Graphics);
            g.Dispose();
            myBuffer.Dispose();//释放资源
        }

窗体还实现了一个功能，就是拖放一张图片到窗体上会成为它的背景

 protected override void OnDragEnter(DragEventArgs drgevent)
        {
            base.OnDragEnter(drgevent);
            drgevent.Effect = DragDropEffects.Move;
        }

        protected override void OnDragDrop(DragEventArgs drgevent)
        {
            base.OnDragDrop(drgevent);
            if (drgevent.Data.GetDataPresent(DataFormats.FileDrop, false))
            {
                String[] files = (String[])drgevent.Data.GetData(DataFormats.FileDrop);

                List tempList = new List();
                foreach (String s in files)
                {
                    if (File.Exists(s))
                    {
                        if (s.EndsWith(".png", StringComparison.CurrentCultureIgnoreCase)
                            || s.EndsWith(".jpg", StringComparison.CurrentCultureIgnoreCase)
                            || s.EndsWith(".bmp", StringComparison.CurrentCultureIgnoreCase))
                        {
                            this.BackgroundImage = Image.FromFile(s);
                            MyFormTemp.CurrentBackgroundImage = this.BackgroundImage;
                        }
                    }
                }

            }
        }