The IDL Author's Guide should address many of your questions:
http://www.mozilla.org/scriptable/xpidl/idl-authors-guide/rules.html
On Thu, 22 Mar 2001 11:11:54 +1200, Patrick McHale
<mchalepNO#[EMAIL PROTECTED]> wrote:
>Hi,
>
>I am trying to figure out the various bits in an IDL file.
>
>The nsISample.idl file has a line 'attribute string value'. I don't
>understand
>what this is for. Also similarly I don't understand the description for:
>
>void writeValue(in string aPrefix);
>void poke(in string aValue);
>
>What is the purpose of specifying 'in' - is this supposed to represent
>Javascript data direction flow between an application. I wish to be able
>to run an C++ application's methods from Javascript as I cannot do this
>via Liveconnect as in previous versions of Netscape. Is there
>documentation anywhere which actually describes this process of
>executing C++ applications methods, and the parameter descriptions used
>in the Javascript code.
>
>There is documentation around about XPCOM / XPConnect - but nothing
>tells me exactly what is needed to be setup from the Javascript end and
>the requirements to be implemented in the actual C++ code.
>
>Patrick McHale
>Powerlan
