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                           Creates a record buffer                            
function PXRecBufOpen
   (TblHandle       : TableHandle;        { table to create buffer for      }
    var RecHandle   : RecordHandle): Int; { returns handle to record buffer }
Errors: PXERR_INVTABLEHANDLE     76  Invalid table handle
        PXERR_OUTOFRECHANDLES   103  No more record handles available | 
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