automating word save as different file from template

[mojo69]

Here is the code causing the error.
An unhandled exception of type 'System.NullReferenceException' occurred in ClientApp.exe

 
    Private Sub btnCreateWordDoc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCreateWordDoc.Click
        Dim WordApp As Word.Application
        WordApp = New Word.Application
        WordApp.Visible = True

        Dim myDoc As Word.Document

        WordApp.Documents.Add("C:\.netprojects\remoting\ClientApp\template.doc")

        myDoc.Bookmarks.Item("bookmark").Range.Text = "test1"

        WordApp.Quit(True)

    End Sub

?????