unmanaged var as member of managed class c++ - class

Question

I'm novice in .net c++ and trying to create class looking like:
public ref class Klient
{
public:
Klient(){}
// zmienne
static DWORD klienty[41][2];
static int i = 1;
static DWORD* pid;
static HANDLE* handle;
//funkcje
};
but MSV says that:
error C4368: cannot define 'klienty' as a member of managed 'Klient': mixed types are not supported
What's wrong with this code?

Answer 1

You can have .NET basic data types as members of your managed class (static int i), or pointers to anything unmanaged (DWORD* pid, HANDLE* handle), but you're not allowed to have an unmanaged object directly, and the array of integers counts as an unmanaged object for this purpose.
Since the only item giving you a problem here is the unmanaged array, you could switch it to a managed array.
public ref class Klient
{
public:
Klient(){}
// zmienne
static array<DWORD,2>^ klienty = gcnew array<DWORD,2>(41,2);
static int i = 1;
static DWORD* pid;
static HANDLE* handle;
//funkcje
};
Or, you can declare a unmanaged class, put whatever you need to in there, and have a pointer to it from the managed class. (If you do this in a non-static context, don't forget to delete the unmanaged memory from your finalizer.)
public class HolderOfUnmanagedStuff
{
public:
DWORD klienty[41][2];
int i;
DWORD* pid;
HANDLE* handle;
HolderOfUnmanagedStuff()
{
i = 1;
}
};
public ref class Klient
{
public:
Klient(){}
// zmienne
static HolderOfUnmanagedStuff* unmanagedStuff = new HolderOfUnmanagedStuff();
//funkcje
};