Destroys a specified object, optionally removing it from the Window Common Area if appropriate.
bDestroyed = Exec_Method( "SYSTEM",
"DESTROY",
ObjectID,
CommRemoveFlag )
| Name | Required | Description |
|---|---|---|
| ObjectID | Yes | ID of the object to be destroyed. If this is "SYSTEM" then the Presentation Server will close the current application and exit. Use this to programmatically shut down the system. |
| CommRemoveFlag | No | If TRUE$ then the object is removed from the Window Common area if appropriate (see remarks below). Defaults to FALSE$ |
TRUE$ if the object was destroyed successfully, FALSE$ otherwise.
If the object to be destroyed is a control hosted on a form then some extra details, such as database and validation information, are stored in an area of memory called the "Window Common Area". Setting the "CommRemoveFlag" to TRUE$ removes this information as well.
Do not use this method to close a form - use the CLOSE event or an appropriate function such as End_Dialog instead.
The following intrinsic objects cannot be destroyed with the SYSTEM DESTROY method:
• CLIPBOARD
• FILESYSTEM
• SYSTEMMONITOR
Note that there also are other "sub-objects", such as IMAGE, GLYPH, and TABS etc., which are managed by their respective owners and cannot be destroyed directly by the SYSTEM DESTROY method. This behavior will be noted in the individual sections detailing them.
$Insert Logical // Destroy a control on a form and ensure data is removed // from the window common area ObjectID = @Window : ".EDL_NAME" Call Exec_Method( "SYSTEM", "DESTROY", ObjectID, TRUE$ ) // Close the application Call Exec_Method( "SYSTEM", "DESTROY", "SYSTEM" )
N/A