RadioButton.ToolTip

Read and write.Type: String.
Contains the text of a pop-up tool tip, which appears when the user put mouse pointer over it.
Thick client.1. If value text doesn't fit the control and if the tool tip is not set, value text is displayed.
2. If value text fits the control and if the tool tip is set, the tool tip is displayed.
3. If value text doesn't fit the control and if the tool tip is set, the tool tip is displayed below the value text.

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