LinkWrite[link,expr] writes expr to the specified MathLink connection.
link must be an active LinkObject, as returned by functions like LinkLaunch or Links.
You can use LinkWrite[link,Unevaluated[expr]] to write expr to the link without evaluating it.
The head of expr will often be a packet which specifies how expr should be processed by the program which receives it.
When LinkWrite is used to send data to a Mathematica kernel, EnterTextPacket["string"] enters the text of an input line, and EvaluatePacket[expr] sends an expression for evaluation.
See the Mathematica book: Section 2.12.6.
See also: LinkRead, Write, FrontEndExecute.
See the Further Examples for LinkLaunch.
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