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

# HDF_VG_INQTR

The HDF_VG_INQTR function returns true if the specified tag and reference pair is linked to the specified VGroup in an HDF file.

## Examples

See HDF_SD_IDTOREF for an example using this function.

## Syntax

Result = HDF_VG_INQTR(VGroup, Tag, Ref)

## Return Value

Returns true if the link exists.

## Arguments

### VGroup

The VGroup handle returned by a previous call to HDF_VG_ATTACH.

### Tag

The tag number.

### Ref

The reference number.

## Keywords

None

## Version History

4.0 | Introduced