public void FormFieldsGetByName()
{
//ExStart
//ExFor:FormField
//ExId:FormFieldsGetByName
//ExSummary:Shows how to access form fields.
Document doc = new Document(MyDir + "FormFields.doc");
FormFieldCollection documentFormFields = doc.Range.FormFields;
FormField formField1 = documentFormFields[3];
FormField formField2 = documentFormFields["CustomerName"];
//ExEnd
}