I develop Microsoft Excel XLL add-ins for the Microsoft Windows platform, providing accurate and reliable computational extensions for use in Excel spreadsheets.
Microsoft developed the Microsoft Excel spreadsheet application to support business and financial modeling and decisions. Manufacturing and product development teams have also used Excel to summarize industrial experiments and development metrics. Excel is a very successful software application and has become the industry standard for spreadsheets.
Microsoft Excel provides many business and financial modeling and visualization tools. However, some useful mathematical and statistical functions are missing from the product. Some provided functions are defined over unnecessarily or inconsistently constrained domains. Some provided functions use inadequately documented algorithms and error estimates. Fortunately, XLL add-ins can extend Excel’s functionality to address otherwise unmet computing needs.
Here I provide Microsoft Excel computational extensions as XLL add-ins. Excel XLL add-ins are dynamic link libraries (DLLs) providing new functionality for Excel. Excel can load and activate an XLL when Excel starts up and the XLL’s additional functionality is then available for use in worksheets in a similar manner to Excel’s built-in functionality. XLL functions implemented in C++ compiled code and can be much faster than comparable functions implemented as macros in VBA.