Buffer Table (Magic xpa 3.x)
The Buffer Table is the interface between the host application and the component that assembles and disassembles a message buffer. The parameters that allow you to use the Buffer Table are:
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Structure Identifier
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Numeric (4). Identifies the buffer format.
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Buffer Index Level
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Numeric (4). This parameter is used for nested buffers. The top level is zero (0).
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Order
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Numeric (3). The internal order within the current buffer index level.
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Nested index
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Numeric (3). If the datatype is Message buffer, this parameter will specify the index of the Buffer Index Level.
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Datatype
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Alpha (1). The Magic datatype, which can have one of the values listed below:
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Picture
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Alpha (30). The Magic picture, which can be set using the VarPic function.
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Storage
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Numeric (2). The storage of the datatype. The valid values are listed in the Storage Types topic.
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Position
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Numeric (5). The value’s position in the buffer.
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Length
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Numeric (5). The length of the datatype, which is also determined by the storage. For Alpha values, this is the length of the string.
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Value
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BLOB.
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