# Viewer API

### Exported functions

Function | Description
--- | ---
ProcessViewerEvent | process viewer events

### Service functions

Function | Description
--- | ---
Viewer | allows to invoke the internal viewer.
ViewerControl | allows to query and control the state of the internal viewer

### Structures

Structure | Description
--- | ---
FARINT64 | used to hold a 64 bit integer value.
ViewerInfo | current viewer state
ViewerMode | information about the current view mode
ViewerSelect | block selection in the internal viewer
ViewerSetMode | set the view mode of the current viewer instance
ViewerSetPosition | position setting in the viewer

See also: