A tutorial of Windom step by step ... ''Ideal'' windows How Windom handles iconification?
Programming guideline of WinDom

Window iconification

Window iconification is automatically supported by WinDom (via EvntWindom() function). The only thing to do (for the programmer) is to define the SMALLER widget when the window is created (call of WindCreate()) and that's all. One of cool WinDom features is the iconification works for any TOS version. To control some visal aspects of iconification (icon title and icon disply) you have to read the two last sections (Drawing the icon windows, Icon title).

However, if you want control window iconify in a different way then WinDom, you have to read the following sections.

How Windom handles iconification?
The iconification messages
The WindGet()/WindSet() functions
The standard functions
Drawing the icon windows
Icon title