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Purpose
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Retrieves the last reference number written to or read from a 24-bit raster image set. |
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Return value
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Returns the non-zero reference number if successful and FAIL (or -1) otherwise. |
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Description
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This routine is primarily used for attaching annotations to 24-bit images and adding 24-bit images to vgroups. DF24lastref returns the reference number of the last 24-bit raster image read or written. |