IntPtr hWnd = WindowHelper.FindWindow(null, "Sticky Pad");

WindowHelper.SetWindowPos(hWnd, WindowHelper.HWND_TOPMOST, 0, 0, 0, 0, WindowHelper.SWP_NOMOVE | WindowHelper.SWP_NOSIZE | WindowHelper.SWP_SHOWWINDOW);

WindowHelper.SetWindowPos(hWnd, WindowHelper.HWND_NO_TOPMOST, 0, 0, 0, 0, WindowHelper.SWP_NOMOVE | WindowHelper.SWP_NOSIZE | WindowHelper.SWP_SHOWWINDOW);



public static class WindowHelper
{
    [DllImport("user32.dll")]
    public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

    public static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
    public static readonly IntPtr HWND_NO_TOPMOST = new IntPtr(-2);
    public const UInt32 SWP_NOSIZE = 0x0001;
    public const UInt32 SWP_NOMOVE = 0x0002;
    public const UInt32 SWP_SHOWWINDOW = 0x0040;

    [DllImport("user32.dll")]
    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
}