Fixed that.
oWord.Selection.HomeKey( Microsoft.Office.Interop.Word.WdUnits.wdStory );
oWord.Selection.ClearFormatting();
bool done = false;
while ( !done )
{
object txt = "#*#";
object oFalse = false;
object oTrue = true;
object wdWrap = Microsoft.Office.Interop.Word.WdFindWrap.wdFindStop;
oWord.Selection.Find.Execute( ref txt, ref oFalse, ref oFalse, ref oTrue, ref oFalse, ref oFalse, ref oTrue, ref wdWrap, ref oFalse );
if ( oWord.Selection.Find.Found == false )
{
done = true;
}
else
{
oWord.Selection.Font.Bold = 1;
oWord.Selection.Text = oWord.Selection.Text.Substring( 1, oWord.Selection.Text.Length - 2 );
oWord.Selection.MoveRight( Microsoft.Office.Interop.Word.WdUnits.wdCharacter );
}
}