public static extern bool GetCursorPos(out POINT point);
public static extern bool ScreenToClient(IntPtr hwnd, ref POINT point);
public static IntPtr DescendantWindowFromCursor(IntPtr hwndParent, out POINT point)
{
POINT cursor;
if (!GetCursorPos(out cursor))
{
point = new POINT();
return IntPtr.Zero;
}
return DescendantWindowFromPoint(hwndParent, cursor, out point);
}
public static IntPtr DescendantWindowFromPoint(IntPtr hwndParent, POINT absPoint, out POINT relativePoint)
{
while (true)
{
relativePoint = absPoint;
ScreenToClient(hwndParent, ref relativePoint);
IntPtr child = ChildWindowFromPoint(hwndParent, relativePoint);
if (child == IntPtr.Zero || child == hwndParent) return child;
hwndParent = child;
}
}
public static extern IntPtr ChildWindowFromPoint(IntPtr hwndParent, POINT point);
public static IntPtr DescendantWindowFromPoint(IntPtr hwndParent, POINT absPoint, out POINT relativePoint)
{
while (true)
{
relativePoint = absPoint;
ScreenToClient(hwndParent, ref relativePoint);
IntPtr child = ChildWindowFromPoint(hwndParent, relativePoint);
if (child == IntPtr.Zero || child == hwndParent)
{
return(child);
}
hwndParent = child;
}
}
public static extern bool ScreenToClient(IntPtr hwnd, ref POINT point);
public static extern bool GetCursorPos(out POINT point);
public static extern IntPtr ChildWindowFromPoint(IntPtr hwndParent, POINT point);
