超详细的SDK说明文档，有示例代码。如：
public void Demo()
{
// Initialize a new BarTender print engine.
using (Engine btEngine = new Engine())
{
// Start the BarTender print engine.
btEngine.Start();
// Specify the format file to be used later.
LabelFormat labelFormat = new LabelFormat(@"C:\Format1.btw");
// Declare messages to be received when opening label format document.
Messages messages = null;
// Open the format document using a label format, receiving
