Build 3.5.0.37 of xlsgen adds exposure to named styles from XLS and XLSX files. For some reason, named styles were not exposed yet so a client application could not use them.

Here is how to use them :

// Use the "60% - Accent4" named style from the XLSX file
xlsgen::IXlsStylePtr sAccent4 = wksht->NamedStyle[L"60% - Accent4"];
sAccent4->Apply();
wksht->Label[5][2] = L"some text";