Try http://msdn.microsoft.com/en-us/library/aa367524(VS.85).aspx (or search
for "Adding Controls and Text").

Thanks you. Very useful.

With this information I could see that the font_mask is empty when it calls the string {\style} and why the installation is wrong.
To get the font mask is reading a MSI record called #ICM but I could not find any information in the web.
The problem is this function with the record and package #ICM in the field 10:

    LPWSTR msi_get_deformatted_field( MSIPACKAGE *package, MSIRECORD *rec, int field )

                                             Values are: #ICM, #ICM,10
    font_mask = msi_get_deformatted_field( dialog->package, rec, 10 );

Someone could give me more information of package or record ICM?

Cheers.
--
Shakaran