c#窗体移动与窗体阴影效果

//步骤
//1.导入代码
//2.事件中添加form_1mousedown函数
//3.在load函数中定义AnimateWindow语句，注意有两个引用。
//4.DllImport若有错误，按shift+alt+F10添加第一个解决
[System.Runtime.InteropServices.DllImport("user32.dll")]//api加载声明
protected static extern bool AnimateWindow(IntPtr hWnd, int dwTime, int dwFlags);//定义AnimateWindow
public const Int32 AW_BLEND = 0x00080000;
public const Int32 AW_CENTER = 0x00000010;
public const Int32 AW_ACTIVATE = 0x00020000;
public const Int32 AW_HIDE = 0x00010000;
public const Int32 AW_SLIDE = 0x00040000;
public Form1()
{
InitializeComponent();
SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DropSHADOW);//API函数加载

，实现窗体边框阴影效果
this.SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint |

ControlStyles.OptimizedDoubleBuffer, true);
}
#region 窗体拖动代码
//
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HTCAPTION = 0x2;

[DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

[DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
private void Form1_MouseDown(object sender, MouseEventArgs e)//在窗体事件中手动添加，注意引用，无引用则无法完成
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
}
#endregion
#region 窗体边框阴影效果
const int CS_DropSHADOW = 0x20000;
const int GCL_STYLE = (-26);
//声明win32 api
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int SetClassLong(IntPtr hwnd, int nIndex, int deNewLong);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int GetClassLong(IntPtr hwnd, int nIndex); #endregion

private void Form1_Load(object sender, EventArgs e)
{
AnimateWindow(this.Handle, 500, AW_BLEND | AW_CENTER | AW_ACTIVATE);

}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
AnimateWindow(this.Handle, 500, AW_CENTER | AW_BLEND | AW_HIDE);
}