时间：2021-06-01 08:53:54 | 栏目：.NET代码 | 点击：次
通过下面代码在构造函数中调用方法 SetShadow();
即可实现无边框窗体的阴影效果了
需要添加命名空间 using System.Runtime.InteropServices;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int SetClassLong(IntPtr hwnd, int nIndex, int dwNewLong);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int GetClassLong(IntPtr hwnd, int nIndex);
private void SetShadow()
{
SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DropSHADOW);
}