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Gets data from a Blob, when opened for reading
function PXBlobGet
(BlbHandle : BlobHandle; { Blob handle to read from }
Size : Word; { size of data to be read }
Offset : Longint; { offset from start of Blob to read }
var Buffer): Integer; { buffer to contain data from Blob }
Errors: PXERR_BLOBMODE 51 Operation not applicable for Blobs open mode
PXERR_BLOBINVOFFSET 53 Invalid offset into Blob
PXERR_BLOBINVSIZE 54 Invalid size for Blob
PXERR_BLOBMODIFIED 55 Another user modified Blob
PXERR_BLOBINVHANDLE 59 Invalid Blob handle |