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Linga
System Builder
ProLinga-4GL Reference Manual
4GL Logic Commands
Table of Contents
BREAK Command
— Transfer control out of a loop structure.
CALL Command
— Execute a specified logic block.
CLEAR Command
— Clear data or screen reference items.
COMMENT Command
— Insert a comment in a logic block.
CONTINUE Command
— Transfer control to the beginning of a loop structure.
CONTROL Command
— Execute a control command.
DATAMODEL Command
— Modify datamodel and matching database table.
DISPLAY Command
— Display the contents of a data reference in a linked screen widget or (re)sets the color.
ELSE Command
— Execute a logic block if no conditions are met.
ELSEIF Command
— Test for an alternative condition if previous condition is not met.
ENDFOR Command
— End of a loop structure.
ENDIF Command
— End of a conditional logic block.
ERROR Command
— Display an error message.
FOCUS Command
— Causes a screen widget to have the keyboard focus.
FOR Command
— Execute a block of logic commands a specified number of times.
FOREACH Command
— Return data rows of a returned datamodel.
FOREVER Command
— Execute a block of logic commands an unlimited number of times.
IF Command
— Test for a condition.
LET Command
— Assign a value to a data reference.
LIST Command
— Build and manage multi column list boxes.
MESSAGE Command
— Display message on statusbar.
NIL Command
— Do nothing.
PARAMETER Command
— Declare parameters for passed values into a logic block.
PROGRESS Command
— Visual progress indicator.
REPOSITORY Command
— Command interface to application repository.
RESPONSE Command
— Set the response object used when using the web interface.
RETURN Command
— Transfer control out of a logic block.
RUN Command
— Execute an operating system command.
SCREEN Command
— Display/close (container) screen or set title.
SLEEP Command
— Pause for a number of seconds.
SQL Command
— Execute an SQL query.
TEXT Command
— Process text documents.
TRANSACTION Command
— Safeley execute SQL command within a transaction environment.
THREAD Command
— Start or stop 4GL logic in a thread.
XML Command
— Process XML documents.
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