VA FileMan DO^DIC1

File Information Setup
The DO^DIC1 entry point retrieves a file's file header node, code to execute its identifiers and its screen (if any), and puts them into local variables for use during lookup into a file.

If $DATA(DO) is greater than zero, DO^DIC1 x will QUIT immediately. If DIC("W") is defined before calling DO^DIC1, it will not be changed.