You can pass the string through as a name, as long as the name makes some kind of numerical sense. For example, if you want to enter a 200 ohm wirewound resistor as "WW200" the 200 can be simply parsed out using the search string function. There is also a boolean to numeric conversion under the boolean toolbox. I assume you are entering the data in a string control.
Eric P. Nichols
P.O. Box 56235
North Pole, AK 99705