Accessing Device Drivers from C#
By David Union, April 01, 2002
Device Drivers are written largely in C or C++. No explicit support for Device Driver communication is included in the current .NET framework. David implements support with C# and discusses how to access Win32 APIs using the Platform Invocation Services and how to make that reusable from within the .NET framework with Overloading.
April 2002/ Accessing Device Drivers from C#
Example 3
Getting data back from a Device Driver
#include <winioctl.h>
#include <iostream.h>
#include "ioctls.h" // this has our IOCTL
int main(int argc, char* argv[]) {
HANDLE hDevice ;
char sOutPut[512];
DWORD dwDummy;
hdevice = CreateFile("\\\\.\\MyDriver", GENERIC_READ | GENERIC_WRITE,
0, NULL, OPEN_EXISTING, 0, NULL);
if (hdevice == INVALID_HANDLE_VALUE) {
cout << "Can't open Driver" << endl;
return -1;
}
if (DeviceIoControl(hDevice, IOCTL_READ_FILE, NULL, 0,
sOutPut, sizeof(sOutPut), &dwDummy, NULL)) {
sOutPut[dwUnused] = 0;
cout << sOutPut << endl;
} else {
cout << "Error " << GetLastError()
<< " in call to DeviceIoControl" << endl;
}
CloseHandle(hdevice);
return 0;
}
