iam using C# to automate Microsoft Word Document.

when i wanted to create a new World Application i used the following code:

Word._Applicati on oWord;
oWord = new Word.Applicatio n();

and i found that Word._Applicati on is an interface and also Word.Applicatio n.

The Question IS:

how can i use the methods and properties of the object oWord, i mean its an object of an Interface...