In general its not intuitive to users to show/hide control on mouse over to some area.
However, you can do this using the Raize control which has the OnMouseEnter and OnMouseLeave events. Note, once you hide or disable a control then the events will not fire. I will recommend to use a Raize Panel control and place the control you want to hide inside the panel then hide/show the control when the mouse enter/leave the panel.
Sample code…
Sub MainDlgRzPanel1MouseEnter(Sender)
maindlg.edt.visible = true
End Sub
Sub MainDlgRzPanel1MouseLeave(Sender)
maindlg.edt.visible = false
End Sub
There is no generic Hint/ToolTip control available. However most, if not all, visual controls have a Hint property (text). There is also a matching ShowHint property (true/false) which could be used to support different configurations.