## StructuredDocumentTa.SetUncheckedSymbol method Sets the symbol used to represent the unchecked state of a check box content control. ```csharp public void SetUncheckedSymbol(int characterCode, s......Document doc = new Document(); DocumentBuilder builder = new DocumentBuilder(doc);...StructuredDocumentTa sdtCheckBox = new StructuredDocumentTa(doc, SdtType...