Reading data from USB port using winspool.drv in C#

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C++

C#

I want to read data from usb printer using pjl commands, some one said, we can read and write is using winspool.drv file.

So whenever i write the commands on winspool api, and then after read a data from printer then it will gives the null value,

so any one can help me, how i can read data directly after writing commands on printer.

Thanks in advance.