Question

I use C#.net.

These is my method now:

    [DllImport(DLLPath, CallingConvention = CallingConvention.Cdecl)]
    unsafe public extern static int AMRecoveryModeDeviceReboot(AMRecoveryDevice device, byte[] paramByte, int u1, int u2, int u3)

I must have a Pointer in it, the AMRecoveryDevice is a struct:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
internal struct AMRecoveryDevice
{
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
    public byte[] unknown0;      /* 0 */
    public DeviceRestoreNotificationCallback callback;    /* 8 */
    public IntPtr user_info;      /* 12 */
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
    public byte[] unknown1;      /* 16 */
    public uint readwrite_pipe;    /* 28 */
    public byte read_pipe;          /* 32 */
    public byte write_ctrl_pipe;    /* 33 */
    public byte read_unknown_pipe;  /* 34 */
    public byte write_file_pipe;    /* 35 */
    public byte write_input_pipe;   /* 36 */
};

Now I must have AMRecoveryDevice as a Pointer in the first method, but then it gives an error.
Is it impossible?

Answer 1

Use ref in method declaration:

[DllImport(DLLPath, CallingConvention = CallingConvention.Cdecl)]
public extern static int AMRecoveryModeDeviceReboot(
    ref AMRecoveryDevice device,
    byte[] paramByte,
    int u1,
    int u2,
    int u3)