@cadffm ,
I had never heard of INPUTHISTORYMODE .
The help doesn't clearly indicate whether what's recalled is on a per command basis or not, but I'm guessing that it doesn't apply to custom AutoLisp command functions.
Anyway, I look at it this way...
There are three (3) levels of saving and recalling default values, all involving the use of a unique symbol name for each variable:
1. Save it in the memory of the current active drawing only.
2. Save it to the bulletin board for access by any drawing in the current AutoCAD session.
3. Save it to a default file (or registry) for access by any drawing at any time.
For example, let's say you have a local variable named 'width. You can save it and recall it in the current active drawing by giving it a unique prefix or suffix or both, such as *width* which you can also set to a popular default value to start with; let's say 2.0.
(if (not (equal (type *width*) 'REAL))
(setq *width* 2.0)
)
(setq width (getdist (strcat "\nWidth <" (rtos *width* 2 1) ">: ")))
(if (not width)
(setq width *width*)
(setq *width* width)
)
For access during the current AutoCAD session, use the vl-bb-ref and vl-bb-set functions.
For access via a default file there are a few techniques, one of which is to write a line for each default, e.g. *width*=2.0. When you read each line of the default file you must use the delimiter (in this example "=") to separate the name from the value. If you are interested, remind me to post a handy function for you.
