When Visible is set to True, the image will be displayed in an application workspace, if it is not already displayed. When Visible is set to False, the image's workspace (if any) will be closed. Note that if the workspace is closed and there are no other references to the image, the image will be destroyed.
If the image is not part of the Images collection when Visible is set True, then it is first added to that collection before being make visible.