HowTo:  Set a map document's properties using ArcObjects

Dim pMapDoc As IMapDocument = New MapDocument()

pMapDoc.Open("C:\\Untitled.mxd")

Dim pDocInfo As IDocumentInfo2 = pMapDoc



'Change the author of the document

pDocInfo.Author = "Esri"



'Change the title of the document.

pDocInfo.DocumentTitle = "My Map Document"



'Change the description of the document

pDocInfo.Comments = "This is a demo."



'Save the change

pMapDoc.Save()

IMapDocument pMapDoc = new MapDocument();

pMapDoc.Open("C:\\Untitled.mxd");

IDocumentInfo2 pDocInfo = (IDocumentInfo2) pMapDoc;

           

//Change the author of the document

pDocInfo.Author = "Esri";



//Change the title of the document.

pDocInfo.DocumentTitle = "My Map Document";



//Change the description of the document

pDocInfo.Comments = "This is a demo."; 



//Save the change

pMapDoc.Save();

IMapDocument pMapDoc = new MapDocument();

pMapDoc.open("C:\\Untitled.mxd", "");

IDocumentInfo2 pDocInfo = (IDocumentInfo2) pMapDoc  ;

		           

//Change the author of the document

pDocInfo.setAuthor("Esri");



//Change the title of the document.

pDocInfo.setDocumentTitle ("My Map Document");



//Change the description of the documentpDocInfo.setComments ("This is a demo."); 



//Save the change	

pMapDoc.save(false, false);

1. IDocumentInfo2 Interface