The NumXL Software Development Kit (SDK) is a set of files used by developers and their environment to utilize NumXL functionality in their own applications.

We highly recommend that you evaluate your computer before installing NumXL products to verify that you meet or exceed the minimum system requirements.

1. NumXL Run-time Environment (NRE)

NumXL supports 32-bit and 64-bit Microsoft Windows, so you need to decide which platform you need to use: 32-bit, 64-bit, or maybe both. The NRE has a separate set of files for each platform, so you will store each set in a separate folder.

We packaged the files of each platform in a separate zipped file (see below).

Latest Release of NumXL 1.66 (1.63.44235.1)

32-bit version
NRE 32-bit (x86)
64-bit version
NRE 64-bit (x64)

2. Development Files & Examples

The SDK is a set of development and runtime wrapper files used by the custom application to invoke the runtime core functionality (e.g. ACF, KDE, etc.).

Currently, the SDK includes development files to support the following development environments:

  • C/C++ 
  • .Net (e.g. C#, VB, etc.)
  • VBA (Excel-based application and/or macros)
C/C++ SDK (32/64-bit)
C/C++ SDK project on GitHub
.Net SDK (32/64-bit)
.Net SDK project on GitHub

Important: All downloads are provided under the terms and conditions of the Spider Financial User Agreement unless otherwise specified. Spider Financial can only guarantee the latest release on the main website (, but not on any 3rd Party sites.