Read the part of the Blob data stored in the table (the leader)        

function PXBlobQuickGet

   (RecHandle       : RecordHandle;      { rec handle containing Blob field }
    FldHandle       : FieldHandle;       { field handle of Blob to be read  }
    BufSize         : Integer;           { size of buffer to hold data      }
    var Dest;                            { buffer to hold data from Blob    }
    var BytesRead   : Integer): Integer; { # of bytes read from the Blob    }

Errors: PXERR_TYPEMISMATCH       30  Data type mismatch
        PXERR_OUTOFMEM           40  Not enough memory to complete operation
        PXERR_INVFIELDHANDLE     75  Invalid field handle
        PXERR_INVRECHANDLE      104  Invalid record handle
        PXERR_BUFTOOSMALL       117  Buffer too small for result


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