How Can I use the a textbox as both a control and indicator at the same time.

[Susumba3]

I want to use a configuration file for my application and be able to change the configuration from the front panel if needed. If I use a textbox I have to use it as a Control when I read from my config file. When I write  the settings of the same textbox to my config file, it need to be an Indicator. How do I handle this.

[Dennis_Knutson]

Write to a local variable of the textbox.