求助！怎么实现窗体四周阴影？？

[dangyj]

怎么实现winform窗体的四周阴影？不用WPF，就是C# GDI+
如果有，请具体写下源码，谢谢

[bdmh]

不要总想着是在窗体外面，你就把窗体的边缘当做外面，在窗体边缘绘制一定像素的阴影色，就能模拟出阴影效果
如果是无边框窗体，可以考虑
http://www.cnblogs.com/huangcong/archive/2010/03/26/1697088.html

[devmiao]

用updatelayeredwindow api

[dangyj]

bdmh 你给的链接效果是系统自带的那种，也就是只是下方和右边有。我要的是四周都有阴影的。

[忘丿殇]

http://download.csdn.net/detail/key4lock/7251651 你可以看下这个

[mcff]

在CNBLOG有相关的帖子..我帮楼主转过来..http://www.cnblogs.com/Keep-Silence-/archive/2013/01/09/2852937.html

[dylike]

做一个透明的阴影层,可用PS等画,保存为PNG,然后用代码设置为窗体透明显示. DSAPI多功能组件编程应用-PNG成为窗体

[fervour]

win7下面窗体自带就有这样的效果。得在xp系统才能看到效果吧。

[crystal_lz]

简单一点的话 设置一下窗体的样式就可以了 SetWindowLong函数 把窗体设置成弹出菜单样式就会有一个阴影了 不过那个阴影不怎么好看 好看一点的还是分层窗体吧

[tzjtzj181]

public partial class Form1 : Form { [DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")] private static extern IntPtr CreateRoundRectRgn ( int nLeftRect, // x-coordinate of upper-left corner int nTopRect, // y-coordinate of upper-left corner int nRightRect, // x-coordinate of lower-right corner int nBottomRect, // y-coordinate of lower-right corner int nWidthEllipse, // height of ellipse int nHeightEllipse // width of ellipse ); [DllImport("dwmapi.dll")] public static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset); [DllImport("dwmapi.dll")] public static extern int DwmSetWindowAttribute(IntPtr hwnd, int attr, ref int attrValue, int attrSize); [DllImport("dwmapi.dll")] public static extern int DwmIsCompositionEnabled(ref int pfEnabled); private bool m_aeroEnabled; // variables for box shadow private const int CS_DROPSHADOW = 0x00020000; private const int WM_NCPAINT = 0x0085; private const int WM_ACTIVATEAPP = 0x001C; public struct MARGINS // struct for box shadow { public int leftWidth; public int rightWidth; public int topHeight; public int bottomHeight; } private const int WM_NCHITTEST = 0x84; // variables for dragging the form private const int HTCLIENT = 0x1; private const int HTCAPTION = 0x2; protected override CreateParams CreateParams { get { m_aeroEnabled = CheckAeroEnabled(); CreateParams cp = base.CreateParams; if (!m_aeroEnabled) cp.ClassStyle |= CS_DROPSHADOW; return cp; } } private bool CheckAeroEnabled() { if (Environment.OSVersion.Version.Major >= 6) { int enabled = 0; DwmIsCompositionEnabled(ref enabled); return (enabled == 1) ? true : false; } return false; } protected override void WndProc(ref Message m) { switch (m.Msg) { case WM_NCPAINT: // box shadow if (m_aeroEnabled) { var v = 2; DwmSetWindowAttribute(this.Handle, 2, ref v, 4); MARGINS margins = new MARGINS() { bottomHeight = 1, leftWidth = 1, rightWidth = 1, topHeight = 1 }; DwmExtendFrameIntoClientArea(this.Handle, ref margins); } break; default: break; } base.WndProc(ref m); if (m.Msg == WM_NCHITTEST && (int)m.Result == HTCLIENT) // drag the form m.Result = (IntPtr)HTCAPTION; } public Form1() { m_aeroEnabled = false; this.FormBorderStyle = FormBorderStyle.None; InitializeComponent(); } } 已测，无问题