The regular task will be shown in group view. To distinguish group tasks from the regular tasks in grid view, you can change the GroupBackColor and GroupFont properties. You can also change the style for all group tasks by picking any group task and then changing the bar style for that task, other group task bar style will updated automatically.

When group view is presenting, the following tool strip items are disabled:

• Move task up/downAdd task
• Add Summary Task
• Add Blank Row
• Indent/Outdent Task
• Show Task Summary

If the selected task is group task or summary task, the following tool strip items are also disabled:

• Delete task
• Task Information (this item also doesn’t appear when you right click to the task bar)

The following Group models are provided:

• Task Mode: Group the tasks by TaskMode property.
• Duration: Group the tasks by Duration property.
• Milestones: Group the tasks by two groups: milestone or not milestone.
• Resource: Group the tasks by their ResourceNames string.
• Status: Group the task by their PercentComplete and ProgressLine.
• ConstraintType: Group the task by their ConstraintType.
• Clear Group: Clear the group view, reset the gantt chart to regular view.
• New Group By: Invoke the Group form to advance group.
• Maintain Hierarchy: To show/hide the hierarchical structure in group view.

To create the advance group view, for example when we want to create a group view that contains two layers of group, open the Group form by selecting  New Group By menu item from Group Menu. For each group layer, there’re three fields to fill up in order to specify a group model:

• Group Type: The type of group such as: Duration, TaskMode, Status.
• Field Name: Only need to fill when Group Type is CustomField.
• Order: The order of group in gantt chart, default is Ascending order.

You could add any number of group models as you want, the blank group model will automatically add below the last group model in Group form each time you’re done with creating the new group model.