It is going to be one of the most dynamic class designs.  It is a very easy to learn and supports RAD. The most unique part of the design is the dynamic message/event handler, which permits runtime configuration for message / event handlers.

So that, tWindows can redirect their events to the parent windows, for event processing at run-time.

tWidgets,  controls for Wiz IDE.

Communication scheme employed by tWidgets on Win32 platform.

A general Win32 program design.

Communication Scheme employed in the tControls.

This makes the communication straight forward, fast, and most importantly it will allow greater access to the internal data of the controls. This permits modifying of the internal data structure through external algorithms, and a possibility of greater customization.      

The tWidget control classes will have interfaces which will allow direct access to the internal data structure of the control. 

Ex: tWindow

The private methods and members of a class can use under score ( _ ) so that it indicates a private member. Local variables inside a function / method can use double under score ( __ ) to distinguish it from other members of the class. The double underscore indicate these are temporary variables.

All the global variables should start with a ' g_ ' prefix to indicate these are global. Ex: g_hInst [Global Instance]  

All the class member should start with a 'c_' prefix to indicate these are form class. Ex: c_hWind [window handle] 

Functions and class declarations should not use the GNU style of brace matching

ie It should NOT be like this

void

tThread::StartThread(){

}

I prefer the general way of matching

void tThread::StartThread()

{

}

The general idea is to have a clearly understandable class structure.

I also like the documentation to be above the class declaration, so that the IDE will automatically fetch help text for the coder. This will eventually obviate the need for expensive documentation and it can easily be updated as and when with modifications and by updates to new version of the library.

Also I will device a scheme by which a link can be placed inside the documentation to the other files, there by it can be more dynamic. IDE will generate the help files form the header-files & some additional documentation files.