Default Tooltip Control Message Processing

This section describes the window messages handled by the window procedure for the TOOLTIPS_CLASS window class.

Message	Default processing
WM_CREATE	Ensures that the tooltip control has the WS_EX_TOOLWINDOW and WS_POPUP window styles. It also allocates memory and initializes internal variables.
WM_DESTROY	Frees resources allocated for the tooltip control.
WM_GETFONT	Returns the handle of the font currently selected into the DC for the tooltip control.
WM_MOUSEMOVE	Hides the tooltip window.
WM_PAINT	Draws the tooltip window.
WM_SETFONT	Selects a new font handle into the DC for the tooltip control.
WM_TIMER	Hides the tooltip window if the tool has changed position or if the cursor has moved outside the tool. Otherwise, it shows the tooltip window.
WM_WININICHANGE	Resets internal variables that are based on system metrics.

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