is the ideal way to allow a user to alter settings for an application
in the background, or automatically. But what are control panel
and how do you write one? Well, after some exploring in the MSDN I
that control panel applets are just standard DLLs with a particular set
points and a .cpl extension. Place such a file in the Windows System
and the next time you start up control panel your applet will be there.
discovered what I needed to know I set about writing a control panel
once I’d done that, I turned the bulk of the code into a mini applet
so I wouldn’t have to write it ever again!
To implement your control panel applet
need to do is the following:
publicly derive a class from CJBControlPanelApplet.
- call the CJBControlPanelApplet
and pass resource IDs for the applet’s icon, name and
- implement the pure virtual
OnDoubleClick() – this is where your applet becomes live and can
dialog or whatever.
- create an instance of your applet
- link with ControlApplet.cpp and
ControlApplet.def in your project. ControlApplet.cpp gives you the
implementation of CJBControlPanelApplet and suitable DllMain() and
CPlApplet() DLL entry point functions.
So that this article and code can be kept up to date more easily
provided a link to where the article is located on my own web pages. Read
the full article and download the source code.
Last updated: 27 June 1998