TWordApplication.Documents:
function  Open(
  var FileName: OleVariant; 
  var ConfirmConversions: OleVariant;
  var ReadOnly: OleVariant; 
  var AddToRecentFiles: OleVariant;
  var PasswordDocument: OleVariant; 
  var PasswordTemplate: OleVariant; 
  var Revert: OleVariant; 
  var WritePasswordDocument: OleVariant; 
  var WritePasswordTemplate: OleVariant; 
  var Format: OleVariant; 
  var Encoding: OleVariant; 
  var Visible: OleVariant): WordDocument; safecall;