ScreenSaver Manager - An example of using the SystemTray class in WTL

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• Download demo project - 36.6 KB

Introduction

Sometimes I need a tool that could stop running the screensaver (for example, when I'm waiting for an important email message). I've looked over CodeProject and found some nice solutions. I gathered them together and spent 3 or 4 hours to write this small tool.

Features

• Enable/disable screensaver from the taskbar
• Restore original state of screensaver on exit
• Restore icon in taskbar after Explorer crashes
• Easy access to Control Panel -> Desktop Settings

Implementation

At the base of this project is Chris Maunder's System Tray class and the Win32 API SystemParametersInfo function.

To start with, I created a WTL Dialog-Based Project and then removed MainDialog, and added a main window class inherited from the CWindowImpl class. To implement check boxes in the popup menu that shows when the user right-clicks in the taskbar icon, I needed to inherit my own class from CSystemTray. Its virtual function CustomizeMenu was rewritten. Then, I added some SystemParametersInfo calls, including CLimitSingleInstance from Microsoft. Some modifications were made in CSystemTray.

Acknowledgments

• System Tray by Chris Maunder
• How to limit 32-bit applications to one instance in Visual C++