Adds a paragraph or a table or a block content control to the current container.
| Name | Type | Description |
| oElement | DocumentElement | The type of the element which will be added to the current container. |
| nPos | Number | The specified position. |
builder.CreateFile("docx");
var oDocument = Api.GetDocument();
var oBlockLvlSdt = Api.CreateBlockLvlSdt();
var oParagraph = Api.CreateParagraph();
oParagraph.AddText("This is a block text content control.");
oBlockLvlSdt.AddElement(oParagraph, 0);
oDocument.AddElement(0, oBlockLvlSdt);
builder.SaveFile("docx", "AddElement.docx");
builder.CloseFile();