<installation-directory>\Sample\Civil 3D API\Vba\SurfacePoints\SurfacePointsSample.dvb
This sample program demonstrates the creation of surfaces using point data loaded from a file and through use of point groups. Surface styles are created and applied.
<installation-directory>\Sample\Civil 3D API\Vba\SurfaceOperations\SurfaceOperationsSample.dvb
This sample demonstrates the elevation analysis and watershed analysis features. The watershed analysis includes a full report of all watershed regions. Breaklines of all kinds, contours, and borders are applied to the surfaces as well.
<installation-directory>\Sample\Civil 3D API\Vba\Corridor\CorridorSample.dvb
A TIN volume surface is created between the corridor datum surface and the ground surface. Cut and fill information is obtained from this volume surface.