fgl_list_find() will retrieve the index
number associated with a value from a combo box control.
This function takes two arguments:
field_name of CHAR(255) datatype that refers to the combo control
value in the form of a character string that represents the item value
searched for. If successful, the function will return the requested index
value within the named field and ‘0’ if no value is found.
Here you can learn more about working with ComboBox in Lycia Form Designer.