Question

In Windows 7 when you touch the screen there is a short animation that occurs at the touch point.

In my WPF app I want to display my own touch points, without showing the one supplied by Windows.

Any ideas on how to disable them in an app?

Answer 1

Found this today whilst taking a look at the Surface Toolkit for Windows Touch, seems to do the job quite nicely.

// override on the Window class
protected override void OnSourceInitialized(EventArgs e)
{
    EnableTabletGestures(this, false);
}

[DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
public static extern short GlobalAddAtom(string atom);

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
public static extern IntPtr RemoveProp(IntPtr hWnd, string atom);

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
public static extern int SetProp(IntPtr hWnd, string atom, IntPtr handle);

public bool EnableTabletGestures(Window window, bool enable)
{
    var hWnd = ((HwndSource)PresentationSource.FromVisual(window)).Handle;

    long num = 0L;
    string atom = "MicrosoftTabletPenServiceProperty";
    num = GlobalAddAtom(atom);
    if (num == 0L)
    {
        return false;
    }
    if (enable)
    {
        return (RemoveProp(hWnd, atom).ToInt64() == 1L);
    }
    int num2 = 0x1010019;
    return (SetProp(hWnd, atom, new IntPtr(num2)) == 1);
}