DeviceIOControl()

I'm getting error 87 (Invalid parameter) from DeviceIOControl():

Code:

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#define CTL_CODE( DeviceType, Function, Method, Access ) (((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method) )

#define FILE_DEVICE_UNKNOWN                0x00000022
#define IOCTL_UNKNOWN_BASE                FILE_DEVICE_UNKNOWN
#define METHOD_BUFFERED                        0
#define FILE_READ_ACCESS                0x0001
#define FILE_WRITE_ACCESS                0x0002

#define IOCTL_CE_READMEMORY                CTL_CODE(IOCTL_UNKNOWN_BASE, 0x0800, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
#define IOCTL_CE_WRITEMEMORY                CTL_CODE(IOCTL_UNKNOWN_BASE, 0x0801, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
#define IOCTL_CE_OPENPROCESS            CTL_CODE(IOCTL_UNKNOWN_BASE, 0x0802, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)


bool LoadDriver::WriteByte(DWORD _Address, BYTE _Byte, int _PID)
{
        unsigned long recv;
                struct input
                {
                  UINT_PTR processid;
                  void *startaddress;
                  unsigned short int bytestowrite; 
                } _Input = {_PID, (void*)_Address, _Byte};
                HANDLE mService = CreateFile("C:\\Rakion\\dbk32.sys", FILE_WRITE_DATA | FILE_READ_DATA, FILE_SHARE_READ | FILE_SHARE_WRITE,
                NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
                cout<<GetLastError()<<"\n"<<flush;
                DeviceIoControl(mService,IOCTL_CE_WRITEMEMORY,&_Input,sizeof(_Input),NULL,NULL,&recv,NULL);
                cout<<GetLastError()<<"      "<<mService<<"\n"<<flush;
        return 0;
}

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As you can see, I used GetLastError(); after CreateFile and DeviceIoControl(); I get 0 (No Error) after CreateFile and 87 (Invalid parameter) after DeviceIoControl.

Which parameter is wrong? I've tried at least 20 variations of the function.

Invalid parameter means exactly what it says. Search google.com for DeviceIoControl and you'll find the definition, then figure out which parameter is wrong.

Quote:

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Originally Posted by durban

Invalid parameter means exactly what it says. Search google.com for DeviceIoControl and you'll find the definition, then figure out which parameter is wrong.

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I've done that, which is why I'm asking here.

It's not a compiler error. Everything is correct according to MSDN.

Don't be an ass.