Código:
Gracias DocApp = new ActiveXObject("Word.Application");
var DocWord = DocApp.Documents.Open(ruta);
....
fillField(DocWord,"LOGO","ruta de la imagen");
function fillField(DocObj,strOld,strNew)
{
var strFieldOld = "«" + strOld + "»"
var enc = true;
while (enc)
{
enc = DocObj.Selection.Find.Execute(strFieldOld);
if (enc)
{
var x = DocObj.Selection.Application;
DocObj.Selection.Cut();
DocObj.Selection.Range.InlineShapes.AddPicture(strNew,true,true);
DocObj.Selection.End = 0;
}
}
}


