new,Open a doc

Hello,
I try to open an existing document calling word,I read the definition of
document and other but i don't arrive mycode is:
private void AppelWord(object sender, EventArgs e)

{

Word.Application objWord = new Word.Application();

objWord.Visible = true;

Word.Document objDoc;

object objMissing = System.Reflection.Missing.Value;

objDoc = objWord.Documents.Open([in]"..//Gestion Stoc.docx");//,Object
false,Object true,Oject false,Object false,

// Object false,Object false,Object false,Object null,Object null,Object
null,Object null,Object true,Object null,

// Object null,Object null,Object null);

}

}

I dont understand what I try I provogue always an error.

Could ou help me please

Patrick

PS:excuse my English