Navigation Constants

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

The Microsoft Active Accessibility navigation constants are as follows:

Constant Description
NAVDIR_DOWN
Navigate to the sibling object that is located below the starting object.
NAVDIR_FIRSTCHILD
Navigate to the first child of this object. When this flag is used, 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, it is a sibling of the starting object.
NAVDIR_PREVIOUS
Navigate to the previous logical object; generally, it is a sibling of the starting object.
NAVDIR_RIGHT
Navigate to the sibling object that is located to the right of the starting object.
NAVDIR_UP
Navigate to the sibling object that is located above the starting object.

Requirements

Header
Oleacc.h