请问如何通过DEVMODE的dmPrintQuality成员设置打印分辨率呢？

MSDN上是这么解释的：
Specifies the printer resolution. There are four predefined device-independent values:
DMRES_HIGH
DMRES_MEDIUM
DMRES_LOW
DMRES_DRAFT
If a positive value is specified, it specifies the number of dots per inch (DPI) and is therefore device dependent.

可还是不会……
直接赋值也不行！