I complimented with my XSharp my "SendMailMapi" dll to send mail using Mapi32.
This dll uses: VulcanVOSystemClasses, VulcanVOWin32APILibrary, VulcanVOGUIClasses, VulcanRT.dll and VulcanRTFuncs.dll
In the Vulcan version I had to write in compiler-> general option: / w3001- / w3404- / w3405- / w3010-. If I understand this, this is no longer necessary, right?
Those are vulcan-specific warning numbers, so they do not apply in X#.
So just remove them when you change the app type to X#, see what warnings the X# compiler gives now and if you want to disable some of them, you can do it with
/nowarn:52,165,1690 (replace with the numbers you want of course!)