C#

// Auto-generated file
public partial class DataClass
{
   //...

   public partial class Email
   {
      //...
   }

   //...
}

// Custom file. This will never be modified when you regenerate your model.
public partial class DataClass
{
   //...

   public partial class Email
   {
      public override string ToString()
      {
         //...
      }
   }

   //...
}

public static class Extensions
{
   public static string ToString(this Email email)
   {
      //...
   }
}

[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
[Guid("F4100FB3-75C5-4C4F-8034-9B836598DD1E")]
public interface IDecoder
{
    [return: MarshalAs(UnmanagedType.BStr)]
    StringBuilder Decode([MarshalAs(UnmanagedType.BStr)] ref string encodedString);

public class UfoDecoder : IDecoder
{
    public StringBuilder Decode(ref string encodedString)
    {
        byte[] dec64 = Base64Decode(encodedString);
        byte[] unzipped = CompressionUtility.Decompress(dec64);

        return BinToXml(unzipped);
    }

extern "C" __declspec(dllexport) void decode(char *encString, char *answer )
{

	// Initialize COM.
        HRESULT hr = CoInitialize(NULL);
	IDecoderPtr pIDec(__uuidof(UfoDecoder));
	
        BSTR k1 = bstr_t(encString);
	BSTR k2 = bstr_t(answer);

	pIDec -> Decode(&k1, &k2);

[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
[Guid("F4100FB3-75C5-4C4F-8034-9B836598DD1E")]
public interface IDecoder
{
    [return: MarshalAs(UnmanagedType.BStr)]
    StringBuilder Decode([MarshalAs(UnmanagedType.BStr)] string encodedString);

public class UfoDecoder : IDecoder
{
    public StringBuilder Decode(string encodedString)
    {
        byte[] dec64 = Base64Decode(encodedString);
        byte[] unzipped = CompressionUtility.Decompress(dec64);

        return BinToXml(unzipped);
    }

extern "C" __declspec(dllexport) void decode(char *encString, char *answer )
{
	// Initialize COM.
        HRESULT hr = CoInitialize(NULL);
	IDecoderPtr pIDec(__uuidof(UfoDecoder));

	BSTR k1 = bstr_t(encString);
	BSTR k2 = bstr_t(answer);

	pIDec->Decode(&k1,&k2);

	SysFreeString(k1);
	SysFreeString(k2);
}


int _tmain(int argc, _TCHAR* argv[])
{
	char *xml = (char*)malloc(5000000*sizeof(char));
	char* str = "Some encoded string";
        int length = strlen(str);

	decode(str, xml);

	printf("Decoded = %s",xml);
	
	int vol = strlen(xml);
	return 0;
}

[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
[Guid("F4100FB3-75C5-4C4F-8034-9B836598DD1E")]
public interface IDecoder
{
    [return: MarshalAs(UnmanagedType.BStr)]
    string Decode([MarshalAs(UnmanagedType.BStr)] ref string encodedString);


[ComVisible(true)]
[Guid("85F2DFFB-5655-40DD-A779-94388A2773DC")]
[ProgId("UfoDecodeWrapper.UfoDecoder")]
[ClassInterface(ClassInterfaceType.None)]
[ComDefaultInterface(typeof(IDecoder))]
public class UfoDecoder : IDecoder
{
    public string Decode(ref string encodedString)
    {
        byte[] dec64 = Base64Decode(encodedString);
        byte[] unzipped = CompressionUtility.Decompress(dec64);

        return BinToXml(unzipped);
    }

int _tmain(int argc, _TCHAR* argv[])
{
	char *xml = (char*)malloc(5000000*sizeof(char));
	char* str = "Some encoded string";
        int length = strlen(str);
 
	decode(str, xml);
 
	printf("Decoded = %s",xml);
	
	int vol = strlen(xml);
	return 0;
}

char* str = "A string literal here";

LordZoster wrote:

it's quite a nightmare if the system itself doesn't understand values it automatically wrote