Tag Archives: C++

Xll add-ins; are they worth the trouble?

Posted on June 11, 2010 by dougaj4

As regular readers will know, I occasionally delve into compiling code in C++, or even Fortran, as dlls and link to them with a short piece of VBA to communicate between the spreadsheet and the compiled code.  I have also … Continue reading →

Posted in Excel, Link to dll | Tagged , , , | 8 Comments

Compiled AlgLib Matrix Functions for Excel

Posted on May 27, 2010 by dougaj4

This post describes a series of matrix functions compiled from the AlgLib library code (covered in previous posts) as a dll that can be called from Excel VBA, and used as User Defined Functions (UDFs).  A spreadsheet containing the necessary VBA … Continue reading →

Posted in Arrays, Excel, Link to dll, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 18 Comments

Linking AlgLib C++ to Excel VBA

Posted on May 22, 2010 by dougaj4

The previous post described how to install AlgLib VBA routines in Excel.  It is also possible to make AlgLib c++ routines (compiled as dll’s) available from Excel, either from VBA, or using User Defined Functions (UDFs) directly from the spreadsheet.  Using compiled dll … Continue reading →

Posted in Excel, Link to dll, Maths, Newton, UDFs, VBA | Tagged , , , , , , , | 4 Comments

Linking Excel to C – 3; Avoiding bottlenecks

Posted on September 8, 2008 by dougaj4

The previous post in this series included a C dll to solve cubic polynomial equations that could be called from VBA.  The performance of this routine is compared with a VBA routine using a similar algorithm in the sceenshot below (rows … Continue reading →

Posted in Arrays, Excel, Link to dll, UDFs, VBA | Tagged , , , | 2 Comments

Linking Excel to C – 2

Posted on September 3, 2008 by dougaj4

In the previous post I decribed how to create four simple functions in Visual C++, and how to link them to an Excel spreadsheet or a VBA User Defined Function (UDF). This post will cover: Accessing arrays created in C++ functions … Continue reading →

Posted in Excel, Link to dll, UDFs, VBA | Tagged , , , | 22 Comments