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                 Retrieves a long integer value from a field                  
function PXGetLong
   (RecHandle        : RecordHandle;      { record buffer to get value from }
    FldHandle        : FieldHandle;       { field to get value from         }
    var LValue       : Longint): Integer; { returns value                   }
Errors: PXERR_TYPEMISMATCH       30  Data type mismatch
        PXERR_OUTOFRANGE         31  Argument out of range
        PXERR_INVFIELDHANDLE     75  Invalid field handle
        PXERR_INVRECHANDLE      104  Invalid record handle | 
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