How do i insert a watermark into a Word Document programatically (

[tartancli]

Hi,

I'm trying to insert a watermark witha a Word Add-in. I'm using a variant
of Paul Stubbs code that i found from a Google. The method I'm using is as
follows:

private void addWatermark(Word.Document doc, string WatermarkText)
{



doc.Application.ActiveWindow.View.Type = Word.WdViewType.wdPrintView;

doc.Sections[1].Range.Select();
doc.ActiveWindow.ActivePane.View.SeekView =
Word.WdSeekView.wdSeekCurrentPageHeader;

Word.Selection Selection = doc.Application.Selection;
Word.Shape wmShape;

//Create the watermark shape
Object missing = Type.Missing;
wmShape = Selection.HeaderFooter.Shapes.AddTextEffect(
Microsoft.Office.Core.MsoPresetTextEffect.msoTextEffect1,
WatermarkText, "Times New Roman", 1,
Microsoft.Office.Core.MsoTriState.msoFalse,
Microsoft.Office.Core.MsoTriState.msoFalse,
0, 0, ref missing);

//Set all of the attributes of the watermark


wmShape.Select(ref missing);
wmShape.Name = "PowerPlusWaterMarkObject1";
wmShape.TextEffect.NormalizedHeight =
Microsoft.Office.Core.MsoTriState.msoFalse;
wmShape.Line.Visible = Microsoft.Office.Core.MsoTriState.msoFalse;
wmShape.Fill.Visible = Microsoft.Office.Core.MsoTriState.msoTrue;
wmShape.Fill.Solid();
wmShape.Fill.ForeColor.RGB = (int)Word.WdColor.wdColorGray25;
wmShape.Fill.Transparency = 0.5f;
wmShape.Rotation = 315.0f;
wmShape.LockAspectRatio = Microsoft.Office.Core.MsoTriState.msoTrue;
wmShape.Height = doc.Application.InchesToPoints(2.82f);
wmShape.Width = doc.Application.InchesToPoints(5.64f);
/*
wmShape.WrapFormat.AllowOverlap = -1; //true
wmShape.WrapFormat.Side = Word.WdWrapSideType.wdWrapBoth;
wmShape.WrapFormat.Type = Word.WdWrapType.wdWrapNone; //3#
*/
wmShape.RelativeHorizontalPosition =
Word.WdRelativeHorizontalPosition.wdRelativeHorizontalPositionMargin;
wmShape.RelativeVerticalPosition =
Word.WdRelativeVerticalPosition.wdRelativeVerticalPositionMargin;
wmShape.Left = (float)Word.WdShapePosition.wdShapeCenter;
wmShape.Top = (float)Word.WdShapePosition.wdShapeCenter;

//set focus back to document
doc.Application.ActiveWindow.ActivePane.View.SeekView =
Word.WdSeekView.wdSeekMainDocument;


} // end addWatermark

The problem i have is that I get an exception at line:
wmShape.WrapFormat.AllowOverlap = -1;

this excpetion indicated that the method or property is not available
because the drawing operation cannot be applied to the current selection?????

Any help greatly appreciated!!! Thnx