Hello. Thanks for the answer.
The above problem is no longer relevant, however, a similar problem has appeared.
The problem is floating. When I call method Click() from ArtOfTest.WebAii.Silverlight.UserInteraction, the cursor is hovered over the element, but it does not click. I looked in the source and found the next implementation.
width = 0;
._element.Application.ContentWindow.Handle, -20) & 4194304) != 0)
NativeMethods.RECT rECT =
width -= rECT.Width;
Point(width, 0), OffsetReference.AbsoluteCenter);
When I replaced method Click() to Click(MouseClickType.LeftClick, 0, 0, OffsetReference.AbsoluteCenter), the error disappeared.
Probably parameter "width" is incorrectly calculated.
Please, can describe how method Click(MouseClickType clickType) should work and what are these magic numbers?