Remember that you must move the cursor out of the window before
closing it, otherwise the window reopens automatically.

Example：

In a form. with windows ”Header,” ”Lines,” and ”Shipments,” where
Lines is a detail of Header, and Shipments is a detail of Lines, the logic
to close the windows is as follows:
PROCEDURE close_window (wnd VARCHAR2) IS
IF wnd = ’HEADER’ THEN
––
–– Exit the form
––
app_window.close_first_window;
ELSIF wnd = ’LINES’ THEN
––
–– Close detail windows (Shipments)
––
app_custom.close_window(’SHIPMENTS’);
––
–– If cursor is in this window,

–– move it to the HEADER block
––
IF (wnd = GET_VIEW_PROPERTY(GET_ITEM_PROPERTY(
:SYSTEM.CURSOR_ITEM,ITEM_CANVAS),
WINDOW_NAME)) THEN
GO_BLOCK(’HEADER’);
END IF;
ELSIF wnd = ’SHIPMENTS’ THEN
––
–– If cursor is in this window,
–– move it to the LINES block
––
IF (wnd = GET_VIEW_PROPERTY(GET_ITEM_PROPERTY(
:SYSTEM.CURSOR_ITEM, ITEM_CANVAS),
WINDOW_NAME)) THEN
GO_BLOCK(’LINES’);
END IF;
END IF;
––
–– THIS CODE MUST REMAIN HERE. It ensures
–– the cursor is not in the window that will
–– be closed by moving it to the previous block.
––
IF (wnd = GET_VIEW_PROPERTY(GET_ITEM_PROPERTY(
:SYSTEM.CURSOR_ITEM, ITEM_CANVAS),
WINDOW_NAME)) THEN
DO_KEY(’PREVIOUS_BLOCK’);
END IF;
––
–– Now actually close the designated window
––
HIDE_WINDOW(wnd);
END close_window;