Compresses a string using the GZip protocol.
Note: This is a static function not a method of wwAPI
Data as a binary string. Empty string on failure.
The string to compress
1-9 where 1 is least compression and 9 is most. 9 is slower. Recommend not setting setting - -1 = default and lets library decide which is usually compression level of 6
Requires that ZLib1.dll is available in the FoxPro path.Based on the open source ZLib library (www.zlib.net)
This function uses temporary files in the Temp folder to unzip the Zip data.
See also:Class wwAPI | GZipUncompressString
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