fgl_dialog_getfieldname()
Returns the name of the current input field.
Syntax
fgl_dialog_getfieldname()
  RETURNS STRING
Usage
This function returns the name of the current input field during a dialog
 execution. It must be use in INPUT, INPUT ARRAY
 or CONSTRUCT blocks.
Only the column part of the field name is returned (screen record name is omitted).
The fgl_dialog_getfieldname() is similar to the
 INFIELD() 
 operator and fgl_dialog_infield()
 function.