Robert,
CharSet property of DllImport attribute does not support UTF8 marshalling.
CharSet.Unicode marshalling is used to call DLL functions that expect
LPCWSTR or LPWSTR.
dns_sd functions expect 0-terminated sequences of bytes, not wchar_t's.
After fixing string marshalling, I tested the dnssd.net.dll
by registering a service named "Hello \u65a9 World!". It showed up correctly
in Safari Rendezvous browser and in my Windows test app with the *same*
glyph. Before the fix, I was getting just an empty square character.
When I toyed with writing a dnssd.dll wrapper in C#, I had to write a custom
marshaller to successfully pass strings from C# code to dns_sd and back.
See MarshalAs attribute documentation.
-----Original Message-----
From: Robert MacGregor
To: Pavel Repin; 'email@hidden'
Sent: 7/19/04 6:12 AM
Subject: Re: mDNSResponder DLL.NET doesn't marshal strings correctly
Pavel,
.NET provides an attribute called CharSet to indicate marshalling
behaviour. Default behaviour for C++ is CharSet.None, equivalent to
CharSet.ANSI :-(. Specifying CharSet.Unicode should get the Unicode
strings without having to code the marshalling yourself. CharSet
applies to the name of the called DLL functions and string parameters
passed to those functions.
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