Routines (alphabetical) > Routines: H > HDF Routines > HDF_DFR8_READREF

# HDF_DFR8_READREF

The HDF_DFR8_READREF procedure sets the reference number of the image to be read from an HDF file by the next call to HDF_DFR8_GETIMAGE.

## Syntax

HDF_DFR8_READREF, Filename, Reference_number

## Arguments

### Filename

A scalar string containing the name of the file to be read.

### Reference_number

A reference number for an 8-bit raster image.

## Keywords

None

## Version History

4.0 | Introduced