Class Template in Visual C++

Hello,

I formed class template that represent two dimensional array :

Code:

template<class T>
class Array2D {
protected:  

public:
      T *data;

        const unsigned rows, cols, size;
        Array2D(unsigned r, unsigned c) : rows(r), cols(c), size(r*c) {

      data = new T[size];
        }
        ~Array2D() { delete data; }
        void setValue(unsigned row, unsigned col, T value) { 
                data[(row*cols)+col] = value;
        }
        T getValue(unsigned row, unsigned col) const {
                return data[(row*cols)+col];
        }
};

And there is present one dimensional data array :

Code:

array<double>^ input={20,4,6,15,7,2,1,8,9};

have function it's inputs are class template and one dimensional data array.I set one dimensional array values to class template :

Code:

void function(Array2d<double> &x,array< double>^ input,int width,int,height)
{


double temp;
temp1=0;

double temp2;

int i,j;

// assign input array values to two dimensional array
for(i=0;i<width;i++)
for(j=0;j<height;j++)
{
{ temp2=input[temp1];
  x.setvalue(i,j,temp2);
  temp1=temp1+1;
}
}

}

After all I declared 3x3 class template:

Code:

Array2D<double>A(3,3);

I sent it to function:

Code:

function(A,input,3,3);

And I tried to print Array2D values:

Code:

double temp;
for(i=0;i<3;i++)
for(j=0;j<3;j++)
{
{temp=A.getValue(i,j)

Console:Write("{0}",temp);}}

I executed this applicaiton in CLR Application in Visual Studio 2008 amd it worked .But I want to implement this code on Windows Form Application,and it gave error like these on Form Application:

Code:

error C2065: 'Array2D' : undeclared identifier
error C2065: 'A' : undeclared identifier

How can I overcome this error or where should I locate class template?

Best Regards...

Just put the declaration in a header file and the definition in a source file, then use the preprocessor #include to allow use of the code in the header file.... but that's not the case is it?