This function initializes the HDF GR interface for the specified file. This function is used with the HDF_GR_END procedure to define the extent of the HDF GR interface session. As with the start routines in the other interfaces, HDF_GR_START initializes the internal interface structures needed for the remaining HDF_GR_ routines. Use the general purpose routines HDF_OPEN and HDF_CLOSE to manage file access. The HDF_GR_ routines will not open and close HDF files.
Note: Failure to use HDF_CLOSE properly may result in lost data or corrupted HDF files.
Syntax
Result = HDF_GR_START(file_id)
Return Value
Returns the HDF GR interface identifier if successful or FAIL (-1) otherwise.
Arguments
file_id
File identifier returned by HDF_OPEN.
Keywords
None
Version History