The following values, defined in oleacc.h, indicate spatial (up, down, left, and right) or logical (first child, last child, next, and previous) directions when clients navigate from one user interface element to another within the same container using IAccessible::accNavigate. For more information, see Object Navigation Properties and Methods.

The Microsoft Active Accessibility navigation constants are as follows:

NAVDIR_DOWN

Navigate to the sibling object located below the starting object.

NAVDIR_FIRSTCHILD

Navigate to the first child of this object. When using this flag, the lVal member of the varStart parameter must be CHILDID_SELF.

NAVDIR_LASTCHILD

Navigate to the last child of this object. When using this flag, the lVal member of the varStart parameter must be CHILDID_SELF.

NAVDIR_LEFT

Navigate to the sibling object located to the left of the starting object.

NAVDIR_NEXT

Navigate to the next logical object, generally a sibling to the starting object.

NAVDIR_PREVIOUS

Navigate to the previous logical object, generally a sibling to the starting object.

NAVDIR_RIGHT

Navigate to the sibling object located to the right of the starting object.

NAVDIR_UP

Navigate to the sibling object located above the starting object.