##### Define > Custom Field Type > Custom Field Type Properties

# ASP Form Tab

The ASP Form Process code takes what is submitted by the form and returns the session variable with its new value.

The ASP Form Code is Visual Basic code that takes in the field identifier as an argument and returns a new value for the session variable. Below is an example of code that might be entered in the ASP Form tab.

Function CFTFP_My_New_Type(field_identifier)

CFTFP_My_New_Type = Request.QueryString(field_identifier & "val1") & getProp(field_identifier, "add_to_end")

End Function

This function takes the form value and adds the value of the add_to_end property to the end of the session variable.

Properties defined in the Properties tab can be referenced in the ASP Form Processing code. To do this, the property is referenced by the getProp() function call, as seen by the add_to_end property above in the example code.