trouble using unmanaged c++ from c# using dllimport

[alag20]

Hi guys,
i am having trouble importing c++ unmanaged dll into C# [winform]. Can someone help?
Basically i am just trying to create a safearray of strings in c++ and trying to send it to C#.

Here is my c++ code.

extern "C" __declspec(dllexport) BOOL GetStringArr(SAFEARRAY* arr)
{
SAFEARRAY*    myArray;
  SAFEARRAYBOUND  rgsabound[1];
 
  rgsabound[0].lLbound = 0;
  rgsabound[0].cElements = 5;
 
  myArray = SafeArrayCreate(VT_BSTR, 1, rgsabound);
  VARIANT* pvData = (VARIANT*)(myArray->pvData);
 
  pvData[0].vt = VT_BSTR;
  pvData[0].bstrVal = SysAllocString(L"FirstString");
  pvData[1].vt = VT_BSTR;
  pvData[1].bstrVal = SysAllocString(L"SecondString");
  pvData[2].vt = VT_BSTR;
  pvData[2].bstrVal = SysAllocString(L"ThirdString");
  pvData[3].vt = VT_BSTR;
  pvData[3].bstrVal = SysAllocString(L"FourthString");
  pvData[4].vt = VT_BSTR;
  pvData[4].bstrVal = SysAllocString(L"FifthString");
 
  arr = myArray;
  return true;
}
 

Here is my c# code.

[DllImport("MyData.dll", EntryPoint = "GetStringArr")]
public static extern bool GetStringArr([MarshalAs(UnmanagedType.SafeArray)] out Array strServerList); 
 

i am getting exception when i call GetStringArr from C#. i am sure there is something silly i am doing. Can someone please help?

Thanks in advance.

[Plater]

What is the exact exception that you get?