Do you want to write programs in VB.NET to checkif the PDF Drivewr is activated or trial version?

Although PDF Driver SDK is available to those customers who have purchased our DocuCom PDF Driver, it does not provide tsuch interface.

With PDF Driver SDK, you can call PDF Driver in your program as a general printer. DocuCom PDF Driver SDK can help you to write programs that control the behavior of PDF Driver by INI files. But please note, PDF Driver SDK does not provide COM API. If you need to call COM API, please try PDF Server.

For more detail about PDF SDK, please see:http://www.pdfwizard.com/eng/Product/devdrv.asp.