The HDF_VD_ATTACH function accesses a VData with the given Idin an HDF file.

Syntax

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Result = HDF_VD_ATTACH( FileHandle, VData_id [, /READ] [, /WRITE] )

Return Value

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If successful, a handle for that VData is returned, otherwise 0 is returned.

Arguments

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FileHandle

The HDF file handle returned from a previous call to HDF_OPEN.

VData_id

The VData reference number, usually obtained by HDF_VD_GETID or HDF_VD_LONE. Set this argument to -1 to create a new VData.

Keywords

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READ

Set this keyword to open the VData for reading. This is the default.

WRITE

Set this keyword to open the VData for writing. If VData_id is set equal to -1, the file is opened for writing whether or not this keyword is set.

Version History

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4.0	Introduced

See Also

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HDF_VD_DETACH