How Does O'Print work? - First, O'Print gets all printers which are already installed on the Windows PC. - Next, the user will decide which printers they want to share for the appropriate iDevice by simply selecting it in the O'Print control panel. - Finally, O'Print will announce those shared printers (by Apple Bonjour) and display them on all iDevices which within the same LAN with the Windows PC. Then AirPrint from your iPad now. What is the benefit of O'Print? Compare three popular solutions for iPad / iPhone Printing - The simplest solution is to buy a new AirPrint-Compatible Printer, and install it on the same LAN as your iDevices. The AirPrinter also will announce itself via Apple Bonjour to the LAN. The benefit of this solution is simple and direct without a PC, but the disadvantage is that you have to buy a printer. Do you really want to change your existing printer, especially a high-level laser printer? - The second solution is an AirPrint App. Many Airprint Apps are free and allow easy printing to a general network printer. However, its disadvantage is that you must print from the AirPrint App, not the native print engine of iDevices. Therefore, you cannot print from most other apps. In addition, there may be some printer compatibility issues, such that that some printers may not be supported by the AirPrint App. - The third solution is by AirPrint Activator for Windows. Like O'Print, AirPrint Activator can activate all of your printers which are installed already on the PC to be AirPrint-capable so that all of your iPad, iPhone and iPod Touch devices can print directly to the shared printers in PC. Because the printing is accomplished by the native iDevice print engine, you can print from any other app. However, there is also a disadvantage in that you need to open a PC for sharing printers. This solution is more suitable for office print use.