C# WinForm 獲取句柄與置頂窗體

[System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetForegroundWindow(); //獲得本窗體的句柄
[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
public static extern bool SetForegroundWindow(IntPtr hWnd);//設置此窗體為活動窗體
[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true, CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Unicode)]
private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);
//定義變量,句柄類型
public IntPtr Handle1;

Handle1 = new IntPtr(0);
Handle1 = FindWindow(null, Name);
if (Handle1 != IntPtr.Zero)
{
SetForegroundWindow(Handle1);//置頂
}