VB打印任务监控程序的源代码，适时获得当前打印机的任务状态，列出正在打印的任务，同时对所有任务进行管理 ，可结束和暂停任务，写的不错。-VB print job monitoring program s source code, the task of timely access to current printer status, list is printing tasks, while management of all tasks, to end and pause tasks and