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Tooltip Style
There is only one class-specific style associated with toolbars:
TBSTYLE_TOOLTIPS. When you specify this style, the toolbar creates and manages a tooltip
control. A tooltip control is a small pop-up window that contains a line of text
describing a toolbar button. The tooltip control is hidden and appears only when
the user puts the cursor on a toolbar button, leaving it there for
approximately one second. The tooltip control is displayed near the cursor.
When the toolbar receives a WM_MOUSEMOVE message, it sends a notification message to the tooltip control. The tooltip
control sets a timer, and after approximately one second, checks if the cursor
is still at the same location and is on a toolbar button. If it is, the tooltip
control sends the TTN_NEEDTEXT notification message to the parent window to retrieve the descriptive text
for the button. Then the tooltip control creates a pop-up window and displays the
text in the window. The tooltip control destroys the pop-up window when the
user clicks a mouse button or moves the cursor out of the toolbar.
An application that needs to send messages directly to the tooltip control can
retrieve the handle of the tooltip by using the TB_GETTOOLTIPS message. An application can replace the tooltip control of a toolbar by using
the TB_SETTOOLTIPS message. For more information about tooltip controls, see Tooltip Controls.
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