http://www.annoyances.org/exec/show/article02-006
not sure if this is what u mean and I haven't tried it myself, but may be worth checking out
Trevor
This will not add Excel to the system tray, but it will put the Excel window on the TaskBar. JSW
'Put the window on the TaskBar.
Application.WindowState = xlMinimized
'Bring the window back from the TaskBar.
Application.WindowState = xlNormal
To add windows to the System Tray you do not use a macro it is done in windows.
On the Windows Start menu, point to Settings, and then click Taskbar & Start Menu.
Do one of the following:
For Windows 2000 and Windows Me:
Click the Advanced tab.
For Windows 98:
Click the Start Menu Programs tab.
Click Add, and then click Browse.
Locate the program you want to automatically start, and then click it.
Click OK.
Click Next, and then locate and double-click the Startup folder.
Type the name that you want to see on the menu, and then click Finish.
Click OK in the Taskbar and Start Menu Properties dialog box.
A macro can be used to put Excel or a Workbook on the Task Bar but not the System Tray, directly. The Excel Shell command could be used to install to the System Tray, but I have not done so. You could also turn a WorkBook into an add-in and add that WorkBook to the ToolBar under the Excel Window command, this I have done. JSW