GeoDLL supports the development of geodetic software by providing geodetic functions, which are put together into function groups for specific tasks. To use calculations arround the Topographic Maps of Germany in own developments a license for the function group "Map Calculations" can be purchased.
The group "Map Calculations" contains functions for converting geographic coordinates to TK numbers of the topographic maps of Germany and to determine the corner coordinates of the topographic maps.
Detailed descriptions of all geodetic functions of this function group you find here in the online manual!