Using DevicIOControl with VC#

Question

I have created two different Visual C# dll's that make use of DeviceIOControl calls and I have defined them as below:

In first dll:

[DllImport("kernel32.dll", SetLastError = true)]
static extern BOOL DeviceIoControl(
    HANDLE hDevice,
    DWORD dwIoControlCode,
    ref Internal_COMMAND lpInBuffer,
    DWORD nInBufferSize,
    ref ulong lpOutBuffer,
    DWORD nOutBufferSize,
    ref DWORD lpBytesReturned,
    LPOVERLAPPED lpOverlapped);

public struct Internal_COMMAND
{
    public ulong Address;
    public ulong Command;
};

In second dll:

[DllImport("kernel32.dll", SetLastError = true)]
static extern BOOL DeviceIoControl(
    HANDLE hDevice,
    DWORD dwIoControlCode,
    ref char[] lpInBuffer,
    DWORD nInBufferSize,
    ref char[] lpOutBuffer,
    DWORD nOutBufferSize,
    ref DWORD lpBytesReturned,
    LPOVERLAPPED lpOverlapped);

But now I have to make them as a single dll within the same class. So I tried to use the below.

[DllImport("kernel32.dll", SetLastError = true)]
static extern BOOL DeviceIoControl(
    HANDLE hDevice,
    DWORD dwIoControlCode,
    ref char[] lpInBuffer,
    DWORD nInBufferSize,
    ref char[] lpOutBuffer,
    DWORD nOutBufferSize,
    ref DWORD lpBytesReturned,
    LPOVERLAPPED lpOverlapped);

as common definition and passed the variables by converting structure to character array. But the driver does not work as expected

Please guide me with the correct procedure to follow

What on Earth was the point of not posting the code that matters?? Throw that code away, it is broken and completely unnecessary. The C# language supports method overloads, works just as well when they have an attribute. — Hans Passant, Mar 28 '16 at 10:07
@HansPassant Hi... It works as you said I used method overload.... Sorry being so dumb — hazzelnuttie, Mar 28 '16 at 10:45

hazzelnuttie · Accepted Answer · 2016-03-30T05:10:24.370

0

Method overload just worked just as @Hans Passant pointed out

This means I can use both definitions in a single .cs file and method overload takes effect, allowing to use the same function with different parameters

edited Mar 30 '16 at 05:10

answered Mar 28 '16 at 11:02

hazzelnuttie

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Using DevicIOControl with VC#

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