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                 Gets the field type for a given field handle                 
function PXFldType
   (TblHandle        : TableHandle;       { table to get field type from   }
    FldHandle        : FieldHandle;       { field number of field in table }
    var FldType      : NameString): Int;  { field type of field as string  }
Errors: PXERR_INVPARAMETER       33  Invalid argument
        PXERR_INVFIELDHANDLE     75  Invalid field handle
        PXERR_INVTABLEHANDLE     76  Invalid table handle
        PXERR_BUFTOOSMALL       117  Buffer too small for result | 
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