Need a variable in C++ dll

should b used in C++:

Class Name : testClasss

code:

// Test Object Id Type
typedef [public, uuid(7442df10-466d-11d3-be72-0008c719118c)]
BSTR test_ObjectID;

-------------------
above code Used as In VB.Net :

code

Dim obj as testClasss.test_ObjectID

within Any function

obj = "string value"

---------------------
is this possible..?

If you want to uses some C++ code from VB.NET, the best solution is to uses C++/CLI and uses managed code to interface between VB.NET and C++.

class RegularCppClass
{
};

public ref class CppCliClassForVb
{
public:
    property System::String ^Test;
    int GetCpuSpeed();

private:
    // This member cannot be used directly from VB. You will need to add 
    // appropriate member (property or method) to CppCliClassForVb.
    // Also, you will need to do proper memory management of that object
    // by properly defining finalizer and destructor as appropriate.
    RegularCppClass *regularCppClass;
};

Destructors and finalizers in Visual C++[^]

That class can uses regular C++ object if it need to. C++ object need to be allocated by pointer or reference.

If you need in some case to go the other way (a C++ class need to have an hadle to a managed object, you will need gcroot< > (http://msdn.microsoft.com/en-us/library/481fa11f(v=VS.100).aspx[^]).

By using a managed layer between your C++ code and VB, it will be much simpler to uses from VB. You will just have to add a reference to the DLL.

By the way, your C++ code will need to be compiled as managed but with support for standard C++ (assuming you want to uses regular C++ code). That is, you need the option /clr (http://msdn.microsoft.com/en-us/library/k8d11d4s.aspx[^]). This option is available in your project settings.

<code>#include <windows.h>
#include <string.h>
#define BSTR unsigned short*</code>