Available for Button objects.
Read/Write at design time
Read/Write at run time
Specifies whether a Button object is the default button or not. It can be one of the following values:
TRUE Button object is the default button.
FALSE Button object is not the default button (default).
Only a Button object inside a window may be the default button.
REMARKS: When a button has the focus, pressing the
<Enter> or <Space> keys has the same effect than clicking trhe button. On
the other hand, when a Button object is the default button, pressing the <Enter>
key is the same than clicking the button even if it does not have the focus, EXCEPT if the focus is
got by another Button object.