Adding Icons to the System Tray

Changes to the sample project:

CMainFrame::OnCreate()
CMainFrame - Added handlers for Tray menu items.
stdafx.h
SystemTray.cpp/h - I marked my changes/additions with "(md)".
SystemDrayDemo.cpp - I let the frame get displayed so you can use the new Tray
  menu.
BalloonDlg.cpp/h - A dialog used by the Tray/Show Balloon command.


The new methods in CSystemTray are:

CSystemTray() - Added parameters for the balloon tooltip.
CreateEx() - Like Create() but has extra parameters for the balloon tooltip.
  On NT 4 and 9x, it just calls Create().
ShowBalloon() - Pops up a balloon tooltip over the tray icon (Win 2K only).
HideIcon() - On Win 2K, the icon is hidden (using the API) instead of deleted.
ShowIcon() - On Win 2K, the icon is unhidden.  It will reappear in the position
  it was in prior to the HideIcon().
HideIcon() and ShowIcon() have a BOOL parameter that's used only by
  MoveToRight() to force the icon to be deleted and re-added on Win 2K.  This
  parameter shouldn't be formally documented, since the caller should still
  call just "HideIcon()" and "ShowIcon()".


Bug fixes in CSystemTray:

I added a few AfxIsValidString() calls to validate LPCTSTR parameters.
I also used lstrcpyn() to copy strings into the NOTIFYICONDATA
struct to guard against overrunning the char arrays.

Chris Maunder is the co-founder of CodeProject and ContentLab.com, and has been a prominent figure in the software development community for nearly 30 years. Hailing from Australia, Chris has a background in Mathematics, Astrophysics, Environmental Engineering and Defence Research. His programming endeavours span everything from FORTRAN on Super Computers, C++/MFC on Windows, through to to high-load .NET web applications and Python AI applications on everything from macOS to a Raspberry Pi. Chris is a full-stack developer who is as comfortable with SQL as he is with CSS.

In the late 1990s, he and his business partner David Cunningham recognized the need for a platform that would facilitate knowledge-sharing among developers, leading to the establishment of CodeProject.com in 1999. Chris's expertise in programming and his passion for fostering a collaborative environment have played a pivotal role in the success of CodeProject.com. Over the years, the website has grown into a vibrant community where programmers worldwide can connect, exchange ideas, and find solutions to coding challenges. Chris is a prolific contributor to the developer community through his articles and tutorials, and his latest passion project, CodeProject.AI.

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