Parameterized constructor in VC++

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VisualC++

Hi Friends,

I created a sample application in VC++ with two constructors....

class CFirst_ATL
{
public:
    //Default constructor
    CFirst_ATL()
    {
    Num1 = 10;
    Num2 = 5;
    }

    //Parameterized constructor
    CFirst_ATL(int val1,int val2)
    {
        Num1 = val1;
        Num2 = val2;
}
public:
	int Num1,Num2;
	STDMETHOD(AddNumbers)(LONG* ReturnVal);
	STDMETHOD(SubNumbers)(LONG* ReturnVal);
	STDMETHOD(MulNumbers)(LONG* ReturnVal);
	STDMETHOD(DivNumbers)(LONG* ReturnVal);
};

I referenced the dll to my c# application and works fine for default constructor.
I want to call parameterized constructor from my c# application for that I used this code

IFirst_ATL obj = new First_ATL(2,1);

Even after this, value is assigned with 10 and 5 only not 1 and 2.
Can anyone help me on this?

Thanks in advance.