창 항상 위에 설정하는 프로그램을 만들려고 합니다.

C#을 써서 만들고 있습니다.

namespace TEST_ControlHandle
{
public partial class Form1 : Form
{
//좌표 따오기
[DllImport("user32")]
public static extern Int32 GetCursorPos(out POINT pt);
[DllImport("user32")]
public static extern IntPtr WindowFromPoint(POINT pt);

public struct POINT
{
public int x;
public int y;
}
POINT pt;
IntPtr ptHandle; //핸들값

//키보드 후킹
[DllImport("user32.dll")]
static extern uint keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);

globalKeyboardHook gkh = new globalKeyboardHook();

public Form1()
{
InitializeComponent();

gkh.HookedKeys.Add(Keys.LWin);
gkh.HookedKeys.Add(Keys.RWin);
gkh.KeyDown += new KeyEventHandler(Form1_KeyDown);
gkh.KeyUp += new KeyEventHandler(Form1_KeyUp);
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.RWin)
{
gkh.HookedKeys.Add(Keys.D0);
}

e.Handled = true;
}

private void Form1_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.D0)
{
try
{
GetCursorPos(out pt);
ptHandle = WindowFromPoint(pt);
Console.WriteLine("{0}, {1} 위치에 있는 윈도우 핸들: {2:X8}", pt.x, pt.y, ptHandle.ToInt32());
}
catch (Exception)
{
MessageBox.Show("");
}
gkh.HookedKeys.Remove(Keys.D0);
}

e.Handled = true;
}
}
}