Marshalling

[jerome_coder]

Hello all,

I need to use several native dll struct written in C++ in may application :

typedef struct _UF01_INFORMATIONS{
BYTE Type[MAX_MODULE];
BYTE Nombre_Module;
BYTE Nb_Voies[MAX_MODULE];
BYTE Modele[MAX_MODULE];
char *Name[MAX_MODULE];
char *Comments[MAX_MODULE];
BOOL UseInterrupt;
} UF01_INFORMATIONS, *PUF01_INFORMATIONS;

So I wrote this :

[System.Runtime.InteropServices.DllImport(@"C:\Program Files (x86)\SELIAtec\UF01\UF01.dll", EntryPoint = "UF01_OpenDevices", CallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall)]
unsafe static extern Boolean UF01_OpenDevices(ref byte devices);

[System.Runtime.InteropServices.DllImport(@"C:\Program Files (x86)\SELIAtec\UF01\UF01.dll", EntryPoint = "UF01_CloseAll", CallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall)]
static extern void UF01_CloseAll();

[System.Runtime.InteropServices.DllImport(@"C:\Program Files (x86)\SELIAtec\UF01\UF01.dll", EntryPoint = "UF01_UD01_8Entrees", CallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall)]
unsafe static extern Boolean UF01_UD01_8Entrees(byte Device, byte module, ref byte data);

[System.Runtime.InteropServices.DllImport(@"C:\Program Files (x86)\SELIAtec\UF01\UF01.dll", EntryPoint = "UF01_UD01_8Entrees", CallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall)]
unsafe static extern Boolean UF01_GetInfosModule(byte Device, bool Watchdog, ref _UF01_INFORMATIONS uf01);

public Form1()
{
InitializeComponent();

}


[StructLayout(LayoutKind.Sequential)]
public struct _UF01_INFORMATIONS
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
public byte[] Type;
public byte Nombre_Module;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
public byte[] Nb_Voies;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
public byte[] Modele;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
public string[] Name;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
public string[] Comments;
public bool UseInterrupt;
}

private unsafe void button1_Click(object sender, EventArgs e)
{
byte nb_Device= new byte();

_UF01_INFORMATIONS m_infos = new _UF01_INFORMATIONS();
m_infos.Type = new byte[8];
m_infos.Nb_Voies = new byte[8];
m_infos.Modele = new byte[8];
m_infos.Name = new string[8];
m_infos.Comments = new string[8];
m_infos.Nombre_Module = new byte();
m_infos.UseInterrupt = false;
int iSize = Marshal.SizeOf(m_infos);


if (UF01_OpenDevices(ref nb_Device))
{
this.label1.Text = "Number of CPU: " + nb_Device;

if (UF01_GetInfosModule(nb_Device, false, ref m_infos))
{
//m_infos = (_UF01_INFORMATIONS)(Marshal.PtrToStructure(uf01, typeof(_UF01_INFORMATIONS)));
label2.Visible = true;
label2.Text = "NNumber of modules : " + m_infos.Nombre_Module;
}

}
}


The UF01_OpenDevices works but I get false with

if (UF01_GetInfosModule(nb_Device, false, ref m_infos))

Can someone help me please ?

Thanx

Continue reading...