New solution is:
Registration-free COM with Manifest FileRegistration-free COM is a mechanism available on the Microsoft Windows XP (SP2 for .NET-based components) and Microsoft Windows Server 2003 platforms. As the name suggests, the mechanism enables easy (for example, using XCOPY) deployment of COM components to a machine without the need to register them.
With Registration-free COM, you don't have to use "regsvr32" to register the dll as COM object, you also don't need to worry other version of this COM installed on the same machine overwrite your current version.
We strongly recommend that you use Registration-free COM to distribute EASendMail ActiveX Object with your standard exe application. ASP, VBScript or other script application is not suitable with this feature.
Using Manifest FileFor standard exe application, you just need to create a manifest file like this: Open notepad or other text editor, copy/paste the following content to the editor.
Then save it as yourappname.exe.manifest. For example, your application exe file is: myproject1.exe, then save it as myproject1.exe.manifest.
Finally, copy myproject1.exe, myproject1.exe.manifest and EASendMailObj.dll to the same folder on target machine, your application can use EASendMail ActiveX Object directly without COM-registration.
To learn more detail, please have a look at:
http://www.emailarchitect.net/easendmail/sdk/?ct=object_reg_a