开发虚拟打印机的核心，即为虚拟打印机处理器。可以围绕着这个核心，开发我们需要的打印机驱动程序-The development of virtual printer core, namely the virtual printer processor. Will be based around this core, development we need printer driver

GenPrint打印机处理器的演示程序，开发虚拟打印机非常有用-GenPrint printer processor of the demonstration program, the development of virtual printer is very useful