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Open a Blob for Read access
function PXBlobOpenRead
(RecHandle : RecordHandle; { record handle containing Blob field }
FldHandle : FieldHandle; { field handle of Blob to read }
var BlbHandle : BlobHandle): Int; { Blob handle used for reading }
Errors: PXERR_TYPEMISMATCH 30 Data type mismatch
PXERR_BLOBOPEN 52 Blob already open
PXERR_INVFIELDHANDLE 75 Invalid field handle
PXERR_INVRECHANDLE 104 Invalid record handle |
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