dans la MSDN, j'ai trouve ce passage concernant les "Custom Control" mais j'avoue que je ne comprend pas tout.
This functionality is intended to let you use controls other than those supplied by Windows. At run time, the control is associated with a window class (not the same as a C++ class). A more common way to accomplish the same task is to install any control, such as a static control, in your dialog box. Then at run time, in the OnInitDialog function, remove that control and replace it with your own custom control.
Quelqu'un aurait il une idee de comment ca marche??