界面我觉得可以做到跟QQ一样都没问题，本来不想搞成这样的，不过搞来搞去就变成这样了
背景是可以换的，或自定义背景图，或背景颜色
这个界面是怎么做的呢？很多初学者可能比较头疼，用第三方控件有时是很难做成自已想要的效果的，而且有些控件是通过拦截系统消息更改实现的，这样方法虽然用起来简单，但很耗系统资源，建议不要用。
要做自定义界面重点要是这里：
void form_Paint(object sender, PaintEventArgs e) { if (backgroundpic == null) { bodybrush = new LinearGradientBrush(new Rectangle(0, 0, form.Width, form.Height), backGroundColorA, backGroundColorB, LinearGradientMode.Vertical); e.Graphics.FillPath(bodybrush, CreateRoundedRectanglePath(new Rectangle(0, 0, form.Width, form.Height), cornerSiz, CornerPostionType.Body)); //画底色 } else { // e.Graphics.DrawImage(backgroundpic, new Rectangle(0, 0, form.ClientSize.Width, form.ClientSize.Height), 0, 0, backgroundpic.Width, backgroundpic.Height, GraphicsUnit.Pixel); e.Graphics.DrawImage(backgroundpic, new Rectangle(0, 0, form.ClientSize.Width, form.ClientSize.Height), 0, 0, form.ClientSize.Width, form.ClientSize.Height, GraphicsUnit.Pixel, BackGroundImageAttributes); // e.Graphics.DrawImage(backgroundpic, new Rectangle(0, 0, form.ClientSize.Width, form.ClientSize.Height), 0, 0, backgroundpic.Width, backgroundpic.Height, GraphicsUnit.Pixel, BackGroundImageAttributes); } captionBrush = new LinearGradientBrush(new Rectangle(0, 0, e.ClipRectangle.Width, captionTopHeight), Color.FromArgb(captionTopAlpha, Color.White), Color.FromArgb(captionCenterAlpha, Color.White), LinearGradientMode.Vertical); e.Graphics.FillPath(captionBrush, CreateRoundedRectanglePath(new Rectangle(0, 0, form.ClientSize.Width, captionTopHeight), cornerSiz, CornerPostionType.Top)); //画标题栏 captionBrush2 = new LinearGradientBrush(new Rectangle(0, captionTopHeight - 1, e.ClipRectangle.Width, captionBottomHeight+1), Color.FromArgb(captionCenterAlpha, Color.White), Color.FromArgb(captionBottomAlpha, Color.White), LinearGradientMode.Vertical); e.Graphics.FillRectangle(captionBrush2, new Rectangle(0, captionTopHeight, form.ClientSize.Width, captionBottomHeight)); //画标题栏 / PaintBackgroundStyle(e); } 另外自定义后还有一个比较常见的问题，就是没有拖拉窗口大小功能了，这个可以通过程序实现，比较好的方法是拦截窗口消息实现原来的拖拉功能，代码奉上：
protected override void WndProc(ref Message m) { switch (m.Msg) { case Win32Message.WM_NCPAINT: break; case Win32Message.WM_NCACTIVATE: if (m.WParam == (IntPtr)0) { m.Result = (IntPtr)1; } if (m.WParam == (IntPtr)2097152) { m.Result = (IntPtr)1; } break; case Win32Message.WM_NCCALCSIZE: break; case Win32Message.WM_NCHITTEST: Point vPoint = new Point((int)m.LParam & 0xFFFF, (int)m.LParam >> 16 & 0xFFFF); vPoint = PointToClient(vPoint); if (MaximizeBox) { if (vPoint.X <= 3) { if (vPoint.Y <= 3) m.Result = (IntPtr)Win32Message.HTTOPLEFT; else if (vPoint.Y >= Height - 3) m.Result = (IntPtr)Win32Message.HTBOTTOMLEFT; else m.Result = (IntPtr)Win32Message.HTLEFT; } else if (vPoint.X >= Width - 3) { if (vPoint.Y <= 3) m.Result = (IntPtr)Win32Message.HTTOPRIGHT; else if (vPoint.Y >= Height - 3) m.Result = (IntPtr)Win32Message.HTBOTTOMRIGHT; else m.Result = (IntPtr)Win32Message.HTRIGHT; } else if (vPoint.Y <= 3) { m.Result = (IntPtr)Win32Message.HTTOP; } else if (vPoint.Y >= Height - 3) m.Result = (IntPtr)Win32Message.HTBOTTOM; } break; default: base.WndProc(ref m); break; } } 另外附上我的界面实现类，调用很方便简单 ,在窗口构造函数(初始加载的地方就行)处实例化即可 new SkinEngineForm(this);
整个微博桌面应用:
直接用帐号登录是登录不了的，因为新浪已经不允许直接用帐号登录了，做这软件时是可以的
更正一点，圆角的处理在这里：
void cform_SizeChanged(object sender, EventArgs e) { if (form.FormBorderStyle == FormBorderStyle.None) { form.Region = new Region(CreateRoundedRectanglePath(form.ClientRectangle, cornerSiz, cornerPosition)); outRectangleWidth = form.ClientSize.Width - 1; outRectangleHeight = form.ClientSize.Height - 1; intRectangleWidth = form.ClientSize.Width - 2; intRectangleHeight = form.ClientSize.Height - 2; form.Invalidate(); } }
public GraphicsPath CreateRoundedRectanglePath(Rectangle rect, int cornerRadius, CornerPostionType cornerPostion) { roundedRect = new GraphicsPath(); if (cornerPostion == CornerPostionType.Top) { roundedRect.AddBezier(0, 2, 1, 1, 1, 1, 2, 0); roundedRect.AddLine(3, 0, rect.Width - 3, 0); roundedRect.AddBezier(rect.Width - 2, 0, rect.Width - 1, 1, rect.Width - 1, 1, rect.Width, 2); roundedRect.AddLine(rect.Width, 3, rect.Width, rect.Height); roundedRect.AddLine(rect.Width, rect.Height, 0, rect.Height); roundedRect.AddLine(0, rect.Height, 0, 3); } else if (cornerPostion == CornerPostionType.Bottom) { roundedRect.AddLine(0, 0, rect.Width, 0); roundedRect.AddLine(rect.Width, 0, rect.Width, rect.Height - 3); roundedRect.AddBezier(rect.Width, rect.Height - 2, rect.Width - 1, rect.Height - 1, rect.Width - 1, rect.Height - 1, rect.Width - 2, rect.Height); roundedRect.AddLine(rect.Width - 3, rect.Height, 3, rect.Height); roundedRect.AddBezier(0, rect.Height - 2, 1, rect.Height - 1, 1, rect.Height - 1, 2, rect.Height - 1); roundedRect.AddLine(0, rect.Height - 3, 0, 0); } else { roundedRect.AddBezier(0, 2, 1, 1, 1, 1, 2, 0); roundedRect.AddLine(3, 0, rect.Width - 3, 0); roundedRect.AddBezier(rect.Width - 2, 0, rect.Width - 1, 1, rect.Width - 1, 1, rect.Width, 2); roundedRect.AddLine(rect.Width, 3, rect.Width, rect.Height - 3); roundedRect.AddBezier(rect.Width, rect.Height - 2, rect.Width - 1, rect.Height - 1, rect.Width - 1, rect.Height - 1, rect.Width - 2, rect.Height); roundedRect.AddLine(rect.Width - 3, rect.Height, 3, rect.Height); roundedRect.AddBezier(0, rect.Height - 2, 1, rect.Height - 1, 1, rect.Height - 1, 2, rect.Height - 1); roundedRect.AddLine(0, rect.Height - 3, 0, 3); } roundedRect.CloseFigure(); return roundedRect; } }
完整代码请看我提供下载的类库
补充：
有同学留言说到改变窗口大小时界面闪烁比较严重的问题，因为这功能现在也没时间去修改优化，以后有空闲时间可能会把这个皮肤做成独立完整的类，到时在一起优化程序代码。
因为现在的代码是窗口大小变化时是全刷新了，这方面是可以优化的，是先确定需要刷新的区块，只刷新需要更新的区块，这样闪烁就能去掉或减至最低，可以在绘图事件中先定义区块e.Graphics.SetClip(freshClipRectangle);这个freshClipRectangle是需要更新的区域，想研究的同学可以去找找SetClip相关的用法。