How to use an *.obj file (from C++) in VBA?

[niceview]

I can create an *.obj file in C++, say, to multiply two numbers (multiply.obj). Is it possible, from VBA, to link and call this 'multiply.obj' with something like the following code? How?

Private Sub test()
Dim a As Double
Dim b As Double
a = Sheets("Sheet1&quot.Cells(1, 2)
b = Sheets("Sheet1&quot.Cells(2, 2)
out = multiply(a, b)
End Sub

In the old days, one could easily merge different *.obj coming from, say, Fortran and C in the link step. Is it possible to work like that in VBA and C++ or there is something fundamentally wrong with the conceptual model?

Thanks,

NiceView