The
HDF_VD_ATTACH function accesses a
VData
with the given
Id
in a Hierarchical Data Format file. If successful, a handle for that
VData
is returned, otherwise 0 is returned.
Calling Sequence
Result = HDF_VD_ATTACH(
FileHandle, VDataId
)
Arguments
FileHandle
The HDF file handle returned from a previous call to HDF_OPEN.
VDataId
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
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
VDataID
is set equal to -1, the file is opened for writing whether or not this keyword is set.
