ITScriptNet has options that allow the developer to set advanced symbology settings for specific barcode types.  For example, you can limit the symbologies that can be scanned, set maximum or minimum lengths, require checkdigits, etc.  The button is to the left of the Symbology selection drop down in the Input tab of Textboxes, Comboboxes, Listboxes, and Grids.

If this button is disabled, it indicates that advanced options are not available.  What are the reasons for this?

There are several reasons that the Advanced Symbologies option might be disabled.  These include:

1. The selected device type does not support scanning at all.  For example, the generic Windows CE and Windows Mobile device types do not allow any symbology configuration.
2. The selected device type does not support advanced options.  The ITScriptNet client does not support advanced configuration for some devices, either because the device manufacturer does not provide an API, or because it is not implemented in ITScriptNet.
3. A specific symbology was selected from the Symbology drop down.  The Advanced options are only available if the Any/Multiple option is selected.
4. The 'Do not override the Manufacturer's settings' option is selected on the Program Settings screen.  If this option is set, then the manufactuer's settings will not be used so the button is disabled.