If either the BKA_MAJORTAB or BKA_MINORTAB attribute is specified for the usType parameter, the minimum width and height for display is 7 pels to allow space for the tab border and the selection cursor. If the tabs or page buttons are not to be displayed, the height and width can be set to 0.

If the new dimensions cause the notebook size to change, the notebook sends a BKN_NEWPAGESIZE notification code to the application.