Sending Taskbar Messages
Use the
Shell_NotifyIcon function to send messages to add, modify, or delete icons from the status
area. The parameters for
Shell_NotifyIcon include the identifier of the message to send and the address of a
NOTIFYICONDATA structure. The structure members contain information that the system needs to
process the specified message.
To add an icon to the taskbar's status area, send the
NIM_ADD message. The
NOTIFYICONDATA structure that accompanies the message specifies the handle of the icon, the
identifier of the icon, and any ToolTip text for the icon. If the
Show Clock check box in the taskbar properties is selected, the system places the icon
to the immediate left of the clock. Otherwise, the icon appears on the right
side or at the bottom of the taskbar. Any existing icons are shifted to the left
to make room for the new icon.
You can delete an icon from the status area by sending the
NIM_DELETE message. You can send the
NIM_MODIFY message to modify the information that the system maintains for a taskbar
icon, including its icon handle, ToolTip text, and callback message identifier.
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