Controls how long the mouse must remain stationary over a bitmap button before displaying its pop-up hint. Set this variable to the number of hundredths of a second that the mouse must be stationary. The default value is "75" (three-quarters of a second). If you set this variable to "0", pop-up hints are not displayed. Setting this variable to "1" or "2" is not recommended because it may result in the pop-up hint being displayed while the mouse is moving across the button face (because the mouse motion events may occur less than 0.02 seconds apart).