I got the sources of a .NET project that I am trying to compile. Although, the project uses the reference (namespace) Microsoft.Office.Interop.Word from Office 2010 that I cannot find anywhere.
I was able to download the file microsoft.office.interop.word.dll but apparently the one from Office 2007 since it still doesn't compile because the project uses the function Document.SaveAs2 (which is from Office 2010 library).
I have Office 2007 on my computer and Visual Studio 2012 Express for Desktop.
Could you please explain me how this works? How come was I able to download the dll but I cannot find the one from Office 2010. How come my client was able to compile the projet without this dll? Does Visual Studio automatically "connects" to the Microsoft Office libraries if installed when compiling ?
Thank you for your help.
You shouldn't be searching for the dll on your local system yourself if you installed the assemblies correctly. See following link for information on how to download and install office interop libraries without installing office. Second link details how to add the assemblies to your project correctly.
Install Office Primary Interop Assemblies
Office Primary Interop Assemblies
For a further reference here are some pictures detailing how to add the dll correctly:
In your project, right-click on "References" and select "Add" and then "Reference".
Next select "Extensions" in the Reference Manager, scroll to find the correct dll. Which for Microsoft.Office.Interop.Word.dll Office 2010 is the version 14 one.
Install via nuget Microsoft.Office.Interop.Word.
Now that Visual Studio 2019 is out, you can install Microsoft Office interop libraries as part of an optional bundled component called Visual Studio Tools for Office (VSTO).
Microsoft have made this super easier, and you don't need to reference them in the GAC!
I manage to get the Microsoft.Office.Interop extensions listed in the suggested references after installing the Office Tools Bundle installer for VS2012 available here: http://blogs.msdn.com/b/somasegar/archive/2013/03/04/now-available-office-developer-tools-for-visual-studio-2012.aspx
来源：https://stackoverflow.com/questions/28944379/where-can-i-find-microsoft-office-interop-word-dll-2010