Very frustrating dllimport code..

[moodilicious]

I'm trying to call a C dll function passing a structure that looks like this:

typedef struct
{
long lModuleID;
DWORD dwAddress;
long lType;
BOOL fComplete;
long lLength;
BYTE *pbyData;
WORD wTimeoutMS;
long lErrors;
} MEMACCESS_STRUCT_S;

I translate this into the following structure in my managed C++ code:

[StructLayout(LayoutKind::Sequential)]
public __gc class MEMACCESS_STRUCT_S
{
public:
Int32 devAddr;
Int32 memAddr; // DWORD (UInt32)
Int32 type;
Int16 complete; // BOOL -> TRUE=1, FALSE=0
Int32 length;
Byte data[];
Int16 timeout; // WORD (UInt16)
Int32 err;
};

Everything works great except the variable "data" that holds the byte array. I get garbage when I look at the values for the array. What am I doing wrong? Thank you so much for any help... I'm nearing the point of headbutting my monitor and throwing my mouse out the window over this one!

david

[NoHero]

does "Byte *data" ... not solve your problem?

[moodilicious]

Byte* won't compile... it complains about using a pointer in a managed class. I ended up pinning (__pin) my Byte array and assigning it to an IntPtr. This works great!

david