WPF中设置无边框窗体似乎是要将WindowStyle设置为None，AllowTransparency=true，这样才能达到WinForm中无边框窗体的样式。
但是AllowTransparency=true后WPF性能会大大降低，动画很卡。无奈只好关闭；
仅设置WindowStyle为None，似乎达不到理想效果，还是有边框：
立刻想到可以通过API修改窗体风格：SetWindowLong
网上查阅资料，发现去掉了WS_CATION = 0x00C00000L 似乎还是没有效果，看到别人的文章，发现WS_CATION = 0x00C0000L，
两个值不一样，于是全部用上，SetWindowLong(hWnd, GWL_STYLE, oldstyle & (~(0x00C00000L |0x00C0000L)));
终于成功了
真正的无边框窗体，因为公司做触屏程序，需要这样的效果。
将wziyx513225244的文章中封装的类修改了一下，http://blog.csdn.net/wziyx513225244/article/details/6988494
直接一个函数设置风格就OK了。
相信很多人应该都会遇到这个问题，贴出来供大家用：
public class NativeMethods
{
/// <summary> /// 带有外边框和标题的windows的样式 /// </summary>
public const int WS_CAPTION = 0x00C00000;
public const int WS_CAPTION_2 = 0X00C0000;
// public const long WS_BORDER = 0X0080000L;
/// <summary> /// window 扩展样式 分层显示 /// </summary>
public const int WS_EX_LAYERED = 0x00080000;
public const int WS_CHILD = 0x40000000;
/// <summary> /// 带有alpha的样式 /// </summary>
public const int LWA_ALPHA = 0x00000002;
/// <summary> /// 颜色设置 /// </summary>
public const int LWA_COLORKEY = 0x00000001;
/// <summary> /// window的基本样式 /// </summary>
public const int GWL_STYLE = -;
/// <summary> /// window的扩展样式 /// </summary>
public const int GWL_EXSTYLE = -;
/// <summary> /// 设置窗体的样式 /// </summary> /// <param name="handle">操作窗体的句柄</param> /// <param name="oldStyle">进行设置窗体的样式类型.</param> /// <param name="newStyle">新样式</param>
[System.Runtime.InteropServices.DllImport("User32.dll")]
public static extern void SetWindowLong(IntPtr handle, int oldStyle, int newStyle);
/// <summary> /// 获取窗体指定的样式. /// </summary> /// <param name="handle">操作窗体的句柄</param> /// <param name="style">要进行返回的样式</param> /// <returns>当前window的样式</returns>
[System.Runtime.InteropServices.DllImport("User32.dll")]
public static extern int GetWindowLong(IntPtr handle, int style);
/// <summary> /// 设置窗体的工作区域. /// </summary> /// <param name="handle">操作窗体的句柄.</param> /// <param name="handleRegion">操作窗体区域的句柄.</param> /// <param name="regraw">if set to <c>true</c> [regraw].</param> /// <returns>返回值</returns>
[System.Runtime.InteropServices.DllImport("User32.dll")]
public static extern int SetWindowRgn(IntPtr handle, IntPtr handleRegion, bool regraw);
/// <summary> /// 创建带有圆角的区域. /// </summary> /// <param name="x1">左上角坐标的X值.</param> /// <param name="y1">左上角坐标的Y值.</param> /// <param name="x2">右下角坐标的X值.</param> /// <param name="y2">右下角坐标的Y值.</param> /// <param name="width">圆角椭圆的width.</param> /// <param name="height">圆角椭圆的height.</param> /// <returns>hRgn的句柄</returns>
[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern IntPtr CreateRoundRectRgn(int x1, int y1, int x2, int y2, int width, int height);
/// <summary> /// Sets the layered window attributes. /// </summary> /// <param name="handle">要进行操作的窗口句柄</param> /// <param name="colorKey">RGB的值</param> /// <param name="alpha">Alpha的值，透明度</param> /// <param name="flags">附带参数</param> /// <returns>true or false</returns>
[System.Runtime.InteropServices.DllImport("User32.dll")]
public static extern bool SetLayeredWindowAttributes(IntPtr handle, int colorKey, byte alpha, int flags);
/// <summary>
/// 设置窗体为无边框风格
/// </summary>
/// <param name="hWnd"></param>
public static void SetWindowNoBorder(IntPtr hWnd)
{
//// 获取窗体句柄
//IntPtr hwnd = new System.Windows.Interop.WindowInteropHelper(this).Handle;
int oldstyle = NativeMethods.GetWindowLong(hWnd, NativeMethods.GWL_STYLE);
SetWindowLong(hWnd, GWL_STYLE, oldstyle & (~(WS_CAPTION | WS_CAPTION_2)));
//SetWindowLong(hWnd, GWL_EXSTYLE, WS_CHILD);
// 设置窗体为透明窗体
//NativeMethods.SetLayeredWindowAttributes(hWnd, 1 | 2 << 8 | 3 << 16, 0, NativeMethods.LWA_ALPHA);
//// 创建圆角窗体 12 这个值可以根据自身项目进行设置
//NativeMethods.SetWindowRgn(hwnd, NativeMethods.CreateRoundRectRgn(0, 0, Convert.ToInt32(this.ActualWidth), Convert.ToInt32(this.ActualHeight), 12, 12), true);
}
}