C# – How to register Microsoft.SharePoint.DLL file

I am developing C# (VS 2008) code in a SSIS Task (SQL Server 2008 R2) script that will automatically check in (using SPFile method) newly created Excel files into a SharePoint site after they are copied to the appropriate UNC path. Since I am developing on a computer that does not have SharePoint installed, I need to copy to my computer and register the Microsoft.SharePoint.DLL file (version 2010) in order to reference and apply its associated methods.

The problem I am having is that I am unable to register the Micrsooft.SharePoint.DLL file on my computer using Windows 7 and was hoping that somebody can assist.

Here is what I've done so far and with the following results:

1. Copied Microsoft.SharePoint.DLL to folder C:\Windows\System32 and verified that the file is present.
2. Verified that regsvr32.exe is located in folder C:\Windows\System32.

3. Ran the following command in C:\Windows\System32 with the following result:
   regsvr32 Microsoft.SharePoint.DLL

   Box pops up with following message:
   'The module "microsoft.sharepoint.dll" was loaded but the entry-point DllRegisterServer was not found. Make sure that "microsoft.sharepoint.dll" is a valid DLL or OCX file and then try again.'

The DLL file was provided by the SharePoint administrator.

I have also rebooted my computer, as recommended on some other IT sites, but that has made no difference.

Until I can register the Microsoft.SharePoint.DLL file, I cannot apply it as a reference in my code. Can somebody assist?

Thanks.