c#之利用API函數實現動畫表單的方法詳解

這裡主要 利用API函數Animate Window實現表單左右，上下，擴充，淡入滑動或滾動動畫效果，步驟如下：
1.建立表單，使用2個GroupBox控制項。
2.在控制項1中添加2個RadioButton控制項，並設定Text分別為“滾動表單”，“滑動表單”，並使前者Checked設定為True。
3.在空間2中添加6個按鈕，Text分別為“自左向右動畫”，“自右向左動畫”，“自上向下動畫”，“自下向上動畫”，“向外擴充動畫”，“淡入動畫表單”。
4.添加一新的Window表單，設定Text為“動畫表單”。設定其“BackgroundImage”屬性，匯入一張要載入的映像，然後設定其“BackgroundImageLayout”屬性為“Stretch”。
5.各按鈕事件主要代碼如下： 複製代碼 代碼如下:private void button1_Click(object sender, EventArgs e)
{
Form2 myf = new Form2();
if (radioButton1.Checked == true)
{
myf.Text = "自左向右滾動表單動畫效果";
}
else
{
myf.Text = "自左向右滑動表單動畫效果";
}
myf.Show();
}
private void button4_Click(object sender, EventArgs e)
{
Form2 myf = new Form2();
if (radioButton1.Checked == true)
{
myf.Text = "自右向左滾動表單動畫效果";
}
else
{
myf.Text = "自右向左滑動表單動畫效果";
}
myf.Show();
}
private void button2_Click(object sender, EventArgs e)
{
Form2 myf = new Form2();
if (radioButton1.Checked == true)
{
myf.Text = "自上向下滾動表單動畫效果";
}
else
{
myf.Text = "自上向下滑動表單動畫效果";
}
myf.Show();
}
private void button5_Click(object sender, EventArgs e)
{
Form2 myf = new Form2();
if (radioButton1.Checked == true)
{
myf.Text = "自下向上滾動表單動畫效果";
}
else
{
myf.Text = "自下向上滑動表單動畫效果";
}
myf.Show();
}
private void button3_Click(object sender, EventArgs e)
{
Form2 myf = new Form2();
myf.Text = "向外擴充表單動畫效果";
myf.Show();
}
private void button6_Click(object sender, EventArgs e)
{
Form2 myf = new Form2();
myf.Text = "淡入表單動畫效果";
myf.Show();
}

6.雙擊Form2表單，進入程式碼檢視。首先定義公用變數，具體代碼如下：複製代碼 代碼如下: public const Int32 AW_HOR_POSITIVE = 0X00000001;
public const Int32 AW_HOR_NEGATIVE = 0X00000002;
public const Int32 AW_VER_POSITIVE = 0X00000004;
public const Int32 AW_VER_NEGATIVE = 0X00000008;
public const Int32 AW_CENTER = 0X00000010;
public const Int32 AW_HIDE = 0X00010000;
public const Int32 AW_ACTIVATE = 0X00020000;
public const Int32 AW_SLIDE = 0X00040000;
public const Int32 AW_BLEND = 0X00080000;
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
private static extern bool AnimateWindow(IntPtr hwnd,int dwTime,int dwFlags);

7.下面為Form2表單添加載入事件代碼，具體如下：複製代碼 代碼如下: private void Form2_Load(object sender, EventArgs e)
{
if (this.Text == "自左向右滾動表單動畫效果")
{
AnimateWindow(this.Handle,2000,AW_HOR_POSITIVE);
}
if (this.Text == "自左向右滑動表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_SLIDE+AW_HOR_POSITIVE);
}
if (this.Text == "自右向左滾動表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_HOR_NEGATIVE);
}
if (this.Text == "自右向左滑動表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_HOR_NEGATIVE);
}
if (this.Text == "自上向下滾動表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_VER_POSITIVE);
}
if (this.Text == "自上向下滑動表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_VER_POSITIVE);
}
if (this.Text == "自下向上滾動表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_VER_NEGATIVE);
}
if (this.Text == "自下向上滑動表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_VER_NEGATIVE);
}
if (this.Text == "向外擴充表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_CENTER);
}
if (this.Text == "淡入表單動畫效果")
{
AnimateWindow(this.Handle, 2000, AW_BLEND);
}
}//yinyiniao's Blog