MSGDTALEN - input, output or both? -- MIDRANGE-L

Subject: MSGDTALEN - input, output or both?
From: Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx>
Date: Tue, 1 Sep 2015 13:30:11 -0500
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I'm having a brain cramp and for some reason nothing I find online fixes it. When I'm doing a RCVMSG, is the variable I specify in MSGDTALEN an input or an output? Does it tell the API how long my buffer is, or does it tell me how much data it put in there? If I specify MSGDTA but don't specify MSGDTALEN can I overrun my buffer?

Thanks. Just one of those days.

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Follow-Ups:

Re: MSGDTALEN - input, output or both? , Buck Calabro
Re: MSGDTALEN - input, output or both? , CRPence
Re: MSGDTALEN - input, output or both? , Jack Tucky

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