mfc, About Structures

1. Returning a C# structure containing a nested array of structures

2. Interop Structure with array of Structures

I have an interop question:

I'm trying to get the ICONDIR Win32 struct which contains an array of 
ICONDIRENTRY structures to marshall correctly. The problem is that the array 
isn't a set amount and could be any number of ICONDIRENTY structures. The 
good news is that the ICONDIR structure does include the number of entries 
in the ICONDIRENTRY array. How do I properly marshal the structure so that I 
can properly recieve all the structures in the array?


Thanks,
Jacob 

3. C Structure to C# structure using sockets - CSharp/C#

4. C++ structure to C# structure - help needed

I have converted a few C++ structures to C# structures. However, when I use 
them in the code, I get errors in  "internal static BluetoothDeviceInfo 
Create()". I feel I'm doing something wrong while converting the union. 
Could someone help please?

/*
typedef ULONGLONG BTH_ADDR;
typedef struct _BLUETOOTH_ADDRESS {
    union {
        BTH_ADDR ullLong; // easier to compare again BLUETOOTH_NULL_ADDRESS
        BYTE rgBytes[ 6 ];    // easier to format when broken out
    };
} BLUETOOTH_ADDRESS_STRUCT;
#define BLUETOOTH_ADDRESS BLUETOOTH_ADDRESS_STRUCT
#define BLUETOOTH_NULL_ADDRESS ( (ULONGLONG) 0x0 )
*/
[StructLayout(LayoutKind.Explicit)]
internal class BluetoothAddress
{
    [MarshalAs(UnmanagedType.U8)]
    [FieldOffset(0)] internal ulong ullLong;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst=6)]
    [FieldOffset(0)] internal byte[] rgBytes;

    internal BluetoothAddress()
    {
        ullLong = 0;
        rgBytes = new byte[6];
    }
}


/*
typedef struct _BLUETOOTH_DEVICE_INFO {
    DWORD dwSize; // size, in bytes, of this structure - must be the 
sizeof(BLUETOOTH_DEVICE_INFO)
    BLUETOOTH_ADDRESS Address; // Bluetooth address
    ULONG ulClassofDevice; // Bluetooth "Class of Device"
    BOOL fConnected; // Device connected/in use
    BOOL fRemembered; // Device remembered
    BOOL fAuthenticated; // Device authenticated/paired/bonded
    SYSTEMTIME stLastSeen; // Last time the device was seen
    SYSTEMTIME stLastUsed; // Last time the device was used for other than 
RNR, inquiry, or SDP
    WCHAR szName[ BLUETOOTH_MAX_NAME_SIZE ]; // Name of the device
} BLUETOOTH_DEVICE_INFO_STRUCT;
#define BLUETOOTH_DEVICE_INFO BLUETOOTH_DEVICE_INFO_STRUCT
typedef BLUETOOTH_DEVICE_INFO * PBLUETOOTH_DEVICE_INFO;
*/
internal struct SystemTime
{
    public short wYear;
    public short wMonth;
    public short wDayOfWeek;
    public short wDay;
    public short wHour;
    public short wMinute;
    public short wSecond;
    public short wMilliseconds;
}

[StructLayout(LayoutKind.Sequential)]
internal struct BluetoothDeviceInfo
{
    [MarshalAs(UnmanagedType.U4)]
    internal int dwSize;
    [MarshalAs(UnmanagedType.Struct)]
    internal BluetoothAddress Address;
    internal ulong ulClassOfDevice;
    internal bool fConnected;
    internal bool fRemembered;
    internal bool fAuthenticated;
    internal SystemTime stLastSeen;
    internal SystemTime stLastUsed;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst=32)]
    internal char[] szName;

    internal static BluetoothDeviceInfo Create()
    {
        BluetoothDeviceInfo bdi = new BluetoothDeviceInfo();
        //Throws an error on the next line
        //"Type System.Net.Bluetooth.BluetoothDeviceInfo can not be 
marshaled as an unmanaged structure; no meaningful size or offset can be 
computed."
        bdi.dwSize = Marshal.SizeOf(typeof(BluetoothDeviceInfo));
        bdi.szName = new char[32];
        return bdi;
    }
}


/*
typedef struct _BLUETOOTH_DEVICE_SEARCH_PARAMS {
    DWORD dwSize; // IN sizeof this structure
    BOOL fReturnAuthenticated; // IN return authenticated devices
    BOOL fReturnRemembered; // IN return remembered devices
    BOOL fReturnUnknown; // IN return unknown devices
    BOOL fReturnConnected; // IN return connected devices
    BOOL fIssueInquiry; // IN issue a new inquiry
    UCHAR cTimeoutMultiplier; // IN timeout for the inquiry
    HANDLE hRadio; // IN handle to radio to enumerate - NULL == all radios 
will be searched
} BLUETOOTH_DEVICE_SEARCH_PARAMS;
*/
[StructLayout(LayoutKind.Sequential)]
internal struct BluetoothDeviceSearchParams
{
    [MarshalAs(UnmanagedType.U4)]
    internal int dwSize;
    internal bool fReturnAuthenticated;
    internal bool fReturnRemembered;
    internal bool fReturnUnknown;
    internal bool fReturnConnected;
    internal bool fIssueInquiry;
    internal ushort cTimeoutMultiplier;
    internal IntPtr hRadio;

    internal static BluetoothDeviceSearchParams Create(IntPtr hRadio)
    {
        BluetoothDeviceSearchParams dsp = new BluetoothDeviceSearchParams();
        dsp.dwSize = Marshal.SizeOf(typeof(BluetoothDeviceSearchParams));
        dsp.hRadio = hRadio;
        return dsp;
    }
}

Thanks & Regards,

B Vidyadhar Joshi. 

5. Structure array inside structure when passing reference to C++ - CSharp/C#

6. Passing structure pointer within structures

Hi,
I am new to C programming. Here is what I am trying to do

typedef struct A {
	char *a;
}A;

struct B {
	int b;
	A *asample;
};


void main()
{
	struct B bk;
}

Now I want to allocate Hello to bk->asample->a. How do I proceed here. Any 
help will be appreciated

Thanks,
Kunal

7. Copying unmanaged memory pointer of structure to managed structure array

8. convert C++ structure to Matlab structure

Is there any guidance available ? Thx