In Solver Foundation 2.1 we added very basic support for VBA in the Excel Add-In. By obtaining the MSF add-in COM object you can call Solve, which has the same effect as clicking the “Solve” button in the Solver Foundation Ribbon: Here is a code sample...

In this post we introduce some utility methods to make it easier to work with arrays in Solver Foundation programs. Most real models involve either input parameters or output decision variables that involve collections. For example, in an investment portfolio...

In the 2.1 release of Microsoft Solver Foundation, there is a bug in the sample plug-in for the XpressMPSolver. For improved performance variable/row keys are no longer specified by Solver foundation services when creating LinearModel object. In order...

The Solver Foundation team is interested in your experience with the product. Please complete the short survey linked to below and share your thoughts on the current release and prioritization of areas for future releases. Thanks for your time! http:...

Mixed integer programming (MIP) models are one of the most commonly formulated Solver Foundation model types. “Mixed” refers to the fact that such models contain both integer and continuous (real) decision variables. People frequently want...

In a previous post, we discussed modeling tricks for min-max problems .  From there, it is simple to handle absolute values as well.  Consider a problem of the form minimize Abs( a * x + b) where a is a row vector and x is a column vector. ...

When modeling problems, one may come to a formulation that is not directly model-able using the Solver Foundation API, but that may be reformulated as a known Solver Foundation model type (LP, QP, CSP, etc).  Consider certain min-max problems, which...