Listbox to display decimal numbers ??

Hello everyone,
I’m writing a desktop app that receives values ??via serial communication. I planned to convert them to double and keep them in an array (2 columns and up to 300 rows). I want to plot the values ??with Roger Meiers PlotClasses. In addition, I would like to be able to view and scroll through the values ??in a kind of table. Should I use a list box for this? Therefore the values ??have to be strings again, right? Is the creation of the list box line by line when the values ??arrive too slow ? Or is there a more elegant method?

A listbox should be fine for this. At only 300 rows, performance won’t be an issue.