Final answer:
In Microsoft Project, pointing to the Gantt bar for a ghost task shows an Info Tooltip with details about the task, such as dates and resources.
Step-by-step explanation:
When you point to the Gantt bar for a ghost task in Microsoft Project, the program displays a Info Tooltip that contains the details about the ghost task. A ghost task is a task that has been scheduled but is not yet allocated to resources or fully defined. The Info Tooltip is a helpful feature for quickly viewing important information about a task without having to navigate away from the Gantt chart view. It typically shows details like the task's start and end dates, duration, and any assigned resources.