xlsgen, native Excel generator

xlsgen 5.0.0.66 : Security update

ARsT design — Fri, 8 May 2026 23:54:17 GMT

Build 5.0.0.66 of xlsgen updates the security level of two library dependencies :

- libPNG 1.6.56 ==> 1.6.58 (used for r/w PNG pictures)
- libWEBP 1.5.0 ==> 1.6.0 (used for r/w WEBP pictures)

xlsgen 5.0.0.65 : Formula date hinter

ARsT design — Wed, 15 Apr 2026 23:38:21 GMT

Build 5.0.0.65 of xlsgen introduces a formula hinter, meant to ease the use of formulas in cells. At the workbook level, calling IsFormulaADate(formula), along with a formula, returns whether or not the formula returns a date. This is handy if you'd like to know beforehand the formula is going to need a specific cell number format, and act accordingly.


interface IXlsWorkbook, one new function
    IsFormulaADate([in]BSTR formula, [out, retval]BOOL* result);

xlsgen 5.0.0.64 : Security update (II)

ARsT design — Mon, 30 Mar 2026 13:23:07 GMT

Build 5.0.0.64 of xlsgen updates the security level of libPNG (responsible for manipulating PNG pictures) :

- libPNG 1.6.55 ==> 1.6.56

xlsgen 5.0.0.63 : Security update

ARsT design — Fri, 27 Feb 2026 00:19:23 GMT

Build 5.0.0.63 of xlsgen updates the security level of two library dependencies :

- libPNG 1.6.53 ==> 1.6.55
- libZLIB 1.3.1 ==> 1.3.2

xlsgen 5.0.0.62 : Fix pack for pivot tables

ARsT design — Mon, 29 Dec 2025 00:22:17 GMT

Build 5.0.0.62 of xlsgen is a fix pack related to pivot tables. Precisely :

- improved rendering of page field names
- improved rendering of rows in Compact layout mode.
- better writing of row items section in pivot tables. 1) no longer adds page filters 2) takes into account unselected items (normal items and page filters)
- code refactoring
- codegen : improved InsertAt() row calculation (when pivot table has page filters)
- better page filters in pivot tables by taking really them into account when trees are built.
- support for rendering number formats in calculated columns or data fields

xlsgen 5.0.0.61 : Fix for large pivot tables

ARsT design — Thu, 18 Dec 2025 17:09:57 GMT

Build 5.0.0.61 of xlsgen is a performance fix for working with creating large pivot tables. Another o(n2) algorithm gets removed.

xlsgen 5.0.0.60 : Security update

ARsT design — Tue, 16 Dec 2025 16:05:15 GMT

Build 5.0.0.60 of xlsgen is a security update. It updates libpng internally used (library for processing PNG pictures), taking it to the latest 1.6.53 (as of date), thereby fixing 5 vulnerabilities (2 moderate and 3 high).