Mathematics/Scientific Library for VC++ or VB Development

[Sanjeev Visvanatha]

Hello:

I was curious if anybody here has recommendations for a Scientific/Mathematics Library that can be integrated into either Visual C++ or Visual Basic (Express Editions). It is for the purpose of using it within a Windows based console application that performs some engineering calculations.

My basic needs for such a library include:

-Matrix operations (Add, Inverse, Determinant, Multiplication)
-Numerical Integration (of simple functions)

In my search on the subject, I came across the GNU Scientific Library. It seems to be able to integrate into VC++. Any experience with this to share? Any other libraries that may be better suited.

Thanks in advance!