http://msmvps.com/blogs/vandooren/archive/2006/08/31/Differences-between-C_2300_-and-C_2B002B002F00_CLI_2C00_-part-1.aspxLearning C# if you already know C++ is relatively easy. The syntax is similar, and the semantics are definitely a lot easier to understand. Since C# looks like C++, most of the concepts are easy to learn, but here and there are a few details that mightenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/vandooren/archive/2006/08/31/Differences-between-C_2300_-and-C_2B002B002F00_CLI_2C00_-part-1.aspx#1358707Mon, 26 Nov 2007 21:09:50 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1358707vanDooren<p>Hi sorry for the late repIy. It was a busy couple of weeks.</p> <p>I have not really looked into this, but C++ does not know the notion of output only.</p> <p>It is either by reference or by value.</p> <p>DCOM has the notion of input / output or both, but that is a marshaling issue. Marshaling only takes place for the IO direction that was specified in the IDL declaration.</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1358707" width="1" height="1">http://msmvps.com/blogs/vandooren/archive/2006/08/31/Differences-between-C_2300_-and-C_2B002B002F00_CLI_2C00_-part-1.aspx#1296991Sun, 11 Nov 2007 05:07:09 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1296991ytosa<p>What is the corresponding C# &quot;out&quot; for C++/CLI?</p> <p>C# you can have foo (out int [] a) &nbsp;or foo (ref int [] a)</p> <p>I know how to do the second one in C++/CLI like</p> <p>foo( array&lt;int&gt;^% a)</p> <p>Can you tell the first one in C++/CLI?</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1296991" width="1" height="1">