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Take Command / TCC Help v. 26

@UNQKVBA[[u,]filename,"key",bhandle[,length]] : Append a binary blob to the value of an existing UnQlite key/value pair.


uOptional flag that the key and value are Unicode (UTF16)
filenameDatabase opened with @UNQOPEN
keyKey to update
bhandleBinary handle returned by @BALLOC
lengthOptional length (in bytes) to write (if -1 or nor specified, write the entire buffer)


Returns 0 if successful, or the error text if not.