Control block execution order

This table shows the order in which the runtime system executes the control blocks in the DIALOG instruction, according to the context and user action:

Table 1. Control block execution order for the DIALOG instruction
Context / User action	Control Block execution order
Entering the dialog	`BEFORE DIALOG` `BEFORE INPUT`, `BEFORE CONSTRUCT` or `BEFORE DISPLAY` (first sub-dialog getting focus) `BEFORE ROW` (if focus goes to a list) `BEFORE FIELD` (if focus goes to a field)
When the focus goes to an `INPUT`or to a `CONSTRUCT` from a different sub-dialog	Triggers raised by the context of the sub-dialog you leave `BEFORE INPUT` or `BEFORE CONSTRUCT` (new sub-dialog getting focus) `BEFORE FIELD`
When the focus leaves an `INPUT` or a `CONSTRUCT` to a different sub-dialog	`ON CHANGE` (if INPUT and value of current field has changed) `AFTER FIELD` (for the current field) `AFTER INPUT` or `AFTER CONSTRUCT` (current sub-dialog losing focus) Triggers raised by the context of the sub-dialog you enter
When the focus goes to a `DISPLAY ARRAY` list or to an `INPUT ARRAY` list from a different sub-dialog	Triggers raised by the context of the sub-dialog you leave `BEFORE INPUT` or `BEFORE DISPLAY` (new sub-dialog getting focus) `BEFORE ROW` (the row that was selected in the list) `BEFORE FIELD` (if it's an INPUT ARRAY)
When the focus leaves a `DISPLAY ARRAY` or `INPUT ARRAY` list to a different sub-dialog	`ON CHANGE` (if INPUT ARRAY and value of current field has changed) `AFTER FIELD` (if it's an INPUT ARRAY) `AFTER INSERT` (if INPUT ARRAY and current row was just created) or `ON ROW CHANGE` (if INPUT ARRAY and a value in the row has changed) `AFTER ROW` (the current row in the list you leave) `AFTER INPUT` or `AFTER DISPLAY` (current sub-dialog losing focus) Triggers raised by the context of the sub-dialog you enter
Moving from field A to field B in an `INPUT` or `CONSTRUCT` sub-dialog or in the same row of an `INPUT ARRAY` list	`ON CHANGE` ( if value of current field has changed) `AFTER FIELD A` `BEFORE FIELD B`
Moving from field A of an `INPUT` or `CONSTRUCT` sub-dialog to field B in another `INPUT` or `CONSTRUCT` sub-dialog	`ON CHANGE` (if value of current field has changed) `AFTER FIELD A` `AFTER INPUT` or `AFTER CONSTRUCT` (for sub-dialog of field A) `BEFORE INPUT` or `BEFORE CONSTRUCT` (for sub-dialog of field B) `BEFORE FIELD B`
Moving to a different row in a `DISPLAY ARRAY` list	`AFTER ROW` (the row you leave) `BEFORE ROW` (the new current row)
Moving to a different row in an `INPUT ARRAY` list when current row was newly created	`ON CHANGE` (if value of current field has changed) `AFTER FIELD` (for field A in the row you leave) `AFTER INSERT` (the newly created row) `AFTER ROW` (the newly created row) `BEFORE ROW` (the new current row) `BEFORE FIELD` (field in the new current row)
Moving to a different row in an `INPUT ARRAY` list when current row was modified	`ON CHANGE` (if value of current field has changed) `AFTER FIELD` (for field A in the row you leave) `ON ROW CHANGE` (the values in current row have changed) `AFTER ROW` (for the row that was modified) `BEFORE ROW` (the new current row) `BEFORE FIELD` (field in the new current row)
Inserting or appending a new row in an `INPUT ARRAY` list	Triggers raised by the context of the sub-dialog you leave `BEFORE INSERT` (for the new current row) `BEFORE ROW` (the new current row) `BEFORE FIELD` (field in the new current row)
Deleting a row in an `INPUT ARRAY` list	`BEFORE DELETE` (for the current row to be deleted) `AFTER DELETE` (now the deleted row is removed) `AFTER ROW` (for the deleted row) `BEFORE ROW` (the new current row)
Firing the insert or append action for the `ON INSERT` block in a `DISPLAY ARRAY` list	`AFTER ROW` `ON INSERT` `BEFORE ROW`
Firing the delete action for the `ON DELETE` block in a `DISPLAY ARRAY` list	`AFTER ROW` `ON DELETE` `BEFORE ROW`
Validating the dialog with `ACCEPT DIALOG`	`ON CHANGE` (if focus is in input field and value has changed) `AFTER FIELD` (if focus is in input field) `AFTER INSERT` (if INPUT ARRAY and current row was just created) or `ON ROW CHANGE` (if INPUT ARRAY and a value in the row has changed) `AFTER ROW` (if focus is in a list) `AFTER INPUT`, `AFTER CONSTRUCT` or `AFTER CONSTRUCT` (current sub-dialog) `AFTER DIALOG`
Canceling the dialog with `EXIT DIALOG`	None of the control blocks will be executed; we just leave the dialog instruction.