實作效果;

API FindWindow函數 //可用來傳回工作列所在視窗Shell_TrayWnd的句柄
IpClassName :要傳回的視窗的類名稱字元串指針
IpWindowName:要傳回的視窗的名稱
GetWindowRect函數 //擷取任何一個視窗的矩陣範圍的函數
hwnd:目标視窗的句柄
IpRect:存儲視窗區域的Rectangle結構變量
[DllImport("user32.dll")]
public static extern int FindWindow(string IpClassName,string IpWindowName);
[DllImport("user32.dll")]
public static extern int GetWindowRect(int hwnd,ref Rectangle IpRect);
Rectangle rect;
private void button1_Click(object sender, EventArgs e)
{
if ((GetWindowRect(FindWindow("Shell_TrayWnd", null), ref rect)) == 0)
return;
else
{
textBox1.Text = Convert.ToString(rect.Left);
textBox2.Text = Convert.ToString(rect.Top);
textBox3.Text = Convert.ToString(rect.Right);
textBox4.Text = Convert.ToString(rect.Bottom);
}
}