FLUSH removes the form and its associated windows from memory. If the form is displayed on the screen, the FLUSH statement/command also erases the form off the screen.
After a FLUSH the form ID is removed and is not available. A FLUSH should be executed for each form if it is no longer needed. This will free memory space used by the process.
FLUSH form_id [{IF; UNLESS} clause] [iterate_clause]
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form_id |
is an integer field that contains the form ID returned by GENERATE. This field can be a valid user-defined field, a Global Storage (GS) field, or a system field. |
FLUSH %FILL_ID IF (%FILL_ID NE 0)
This statement/command removes the form and its associated window(s) from memory if %FILL_ID is not equal to zero. The form ID is in the GS field %FILL_ID.