四种选取默认打印机的方法，各种方法都比较实用，开发人员可以自己选择合适的打印方法。-Four ways to select the default printer, various methods are more practical, developers can choose a suitable printing method.

quick report使用例子程序，有各种方式打印例子，可以参考下-quick report using the example program, there are various ways to print an example, you can refer to the following

vb动态曲线查询，查询打印历史曲线，可以以各种方式显示曲线-vb dynamic curve queries, query print historical curve, the curve can be displayed in various ways