using System.Runtime.InteropServices;
public class Win32
{
public const Int32 AW_HOR_POSITIVE = 0x00000001; // 从左到右打开窗口
public const Int32 AW_HOR_NEGATIVE = 0x00000002; // 从右到左打开窗口
public const Int32 AW_VER_POSITIVE = 0x00000004; // 从上到下打开窗口
public const Int32 AW_VER_NEGATIVE = 0x00000008; // 从下到上打开窗口
public const Int32 AW_CENTER = 0x00000010;
public const Int32 AW_HIDE = 0x00010000; // 在窗体卸载时若想使用本函数就得加上此常量
public const Int32 AW_ACTIVATE = 0x00020000; //在窗体通过本函数打开后，默认情况下会失去焦点，除非加上本常量
public const Int32 AW_SLIDE = 0x00040000;
public const Int32 AW_BLEND = 0x00080000; // 淡入淡出效果
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern bool AnimateWindow(
IntPtr hwnd, // handle to window
int dwTime, // duration of animation
int dwFlags // animation type
);
}
/*淡入窗体*/ private void Form_Load(object sender, EventArgs e)
{
Win32.AnimateWindow(this.Handle, 2000, Win32.AW_BLEND);
} /*淡出窗体*/ private void Form_FormClosing(object sender, FormClosingEventArgs e)
{
Win32.AnimateWindow(this.Handle, 2000, Win32.AW_SLIDE | Win32.AW_HIDE | Win32.AW_BLEND);
} 本
