/// <summary>
/// Converts a point in screen coordinates in client coordinates relative to a window.
/// </summary>
/// <param name="hwnd">Handle of the window whose client coordinate system should be used.</param>
/// <param name="screenPoint">Point expressed in screen coordinates.</param>
/// <returns>Point expressed in client coordinates.</returns>
public static NPoint ScreenToClient(IntPtr hwnd, NPoint screenPoint)
{
var localCopy = new NPoint(screenPoint);
if (ScreenToClient(hwnd, ref localCopy))
{
return(localCopy);
}
return(new NPoint());
}
/// <summary>
/// Converts a point in client coordinates of a window to screen coordinates.
/// </summary>
/// <param name="hwnd">Handle to the window of the original point.</param>
/// <param name="clientPoint">Point expressed in client coordinates.</param>
/// <returns>Point expressed in screen coordinates.</returns>
public static NPoint ClientToScreen(IntPtr hwnd, NPoint clientPoint)
{
var localCopy = new NPoint(clientPoint);
if (ClientToScreen(hwnd, ref localCopy))
{
return(localCopy);
}
return(new NPoint());
}
public NPoint(NPoint copy)
{
X = copy.X;
Y = copy.Y;
}
private static extern bool ScreenToClient(IntPtr hwnd, ref NPoint point);
private static extern bool ClientToScreen(IntPtr hwnd, ref NPoint point);
public static extern IntPtr RealChildWindowFromPoint(IntPtr parent, NPoint point);