Indicates the state before the EnableWindow member function was called. The return value is nonzero if the window was previously disabled. The return value is 0 if the window was previously enabled or an error occurred.
Tracking tool tips are tool tip windows that you can dynamically position on the screen. By rapidly updating the position, the tool tip window appears to move smoothly, or "track." This functionality can be useful if you need tool tip text to follow the position of the pointer as it moves.