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Navigation Services maintains default location information for dialog boxes. The default location is the folder or volume whose contents will be displayed in the browser list when a dialog box is first displayed. You can override the default location and selection of any Navigation Services dialog box by passing a pointer to an Apple event descriptor (
AEDesc
) structure for the new location in the
defaultLocation
parameter of the appropriate function. This
AEDesc
structure is normally of type
'typeFSS'
describing a file, folder, or volume.
To select the default location instead of displaying it, supply the
kNavSelectDefaultLocation
constant in the
dialogOptionFlags
field of the structure of type you specify in the
dialogOptions
parameter of a Navigation Services function such as . For example, if you pass an
AEDesc
structure describing the System Folder in the
defaultLocation
parameter of the function, Navigation Services displays an Open dialog box with the System Folder as the default location. If you pass the same value to the function and supply the
kNavSelectDefaultLocation
constant in the
dialogOptionFlags
field of the structure, the Open dialog box shows the startup volume as the default location with the System Folder selected.
If you pass
NULL
for the
AEDesc
structure, or attempt to pass an invalid
AEDesc
structure, Navigation Services 1.1 and later displays the desktop as the default location.
