Indirect addressing....

[webmasterpdx]

I'm basically writing my own version of the input function (I won't use the same name), but it takes as input, lets say for an input box/field for a numeric value, something like this is part of the input....
...
{XMin,[0],{15,30,0},
...
where XMin is a variable name. Now, I can pass in a string like "XMin" and use something like
expr(invar+":=4"); to assign values, but this is ugly, and I'd much rather pass in the variable without the quotes, like the current input command. The current input command was written in C/assembler as part of the firmware code. I don't have access to that, and have to write it in HPPL, so, I was hoping there was some trick whereby I could pass in the variable like the current input command by reference. That's all.
Thx
-Donald