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             Used to make a private copy (clone) of a public Blob             
function PXBlobClone
   (RecHandle    : RecordHandle;      { record handle containing Blob field }
    FldHandle    : FieldHandle): Int; { field handle of Blob to be cloned   }
Errors: PXERR_TYPEMISMATCH       30  Data type mismatch
        PXERR_OUTOFMEM           40  Not enough memory to complete operation
        PXERR_BLOBMODIFIED       55  Another user modified Blob
        PXERR_INVFIELDHANDLE     75  Invalid field handle
        PXERR_INVRECHANDLE      104  Invalid record handle | 
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