I'm wondering how can I change the font (+ color and some font style) for the whole word document (excluding the page headers, if it's possible) by using C# ?
If You know any libraries (also commercial) feel free to let me know.
(After changing the font, I'll convert that word document to PDF using ABCPdf)
Depending on the library you would loop through the content (Pages/Paragraphs etc.) and change whatever font attribute you want...
Since you don't say which type of application you build - in case it is a pure desktop application and Word is guranteed to be installed locally you can use Office Interop. BEWARE that Office Interop is NOT supported by MS in server-scenarios (like IIS, ASP.NET. Windows Service, WCF etc.).
IF Word is not guaranteed to be installed and/or your application is not a desktop application and your Word documents are always DOCX files you could use OpenXML SDK V 2 from MS (free).
Otherwise I can recommend Aspose.Words (commercial) - works with old DOC and current DOCX and is usable in any type of application (desktop, ASP.NET, Windows Service etc.).
Handling Office documents in .NET is a quite straight forward task. Have a look at Microsoft.Office.Interop.Word, it is pretty well documented. Here is another link on to how you can change a word document font style using .NET (the example is in VB but is easily convertible to C#)
Start by reading on Microsoft.Office.Interop.Word
(You can google some user-friendly examples, there are tons)
Later on, read about Text Formatting
Easy, isn't it?
