Parallel Port access in XP using DeviceIoControl
This is a discussion about Parallel Port access in XP using DeviceIoControl in the Windows Software category; I am writing a simple printing application which opens the LPT1. I am using CreateFile & WriteFile calls to do this. To find out the printer status I am using DeviceIoControl API with IOCTL_PAR_QUERY_INFORMATION code.
I am writing a simple printing application which opens the LPT1. I am using CreateFile & WriteFile calls to do this. To find out the printer status I am using DeviceIoControl API with IOCTL_PAR_QUERY_INFORMATION code . The problem I am facing is,
When ever I restart the m/c the DeviceIoControl API fails (GetLastError returns 1). Then If I go to devicemanager/ports/Port settings and make some changes and click ok, then the application starts working fine. But If restart the m/c again I have to repeat the same thing. whats the problem ???
Any help would be appriciated. I am using Windows XP
With regards,
Sivaraja T
When ever I restart the m/c the DeviceIoControl API fails (GetLastError returns 1). Then If I go to devicemanager/ports/Port settings and make some changes and click ok, then the application starts working fine. But If restart the m/c again I have to repeat the same thing. whats the problem ???
Any help would be appriciated. I am using Windows XP
With regards,
Sivaraja T
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