The ID of the WebImageViewer which has an image to be pan using the WebImagePanViewer control.
This property contains the ID of the WebImageViewer object which contains an image to be pan using the WebImagePanViewer control.
Whenever the WebImageViewer property is changed, the image displayed in the WebImagePanViewer control is affect by this change.
The WebImagePanViewer will use the BrowseImageFormat of the WebImageViewer referenced by ViewerID when displaying the WebImagePanViewer image, and the same thing for the InputProfile and OutputProfile properties.
Refer to WebImageViewer.OpenImageUrl example.