Task.PathDrivingPredecessor property (Project)

Gets a value that indicates whether the task is a predecessor that drives the selected task, when the Driving Predecessors item is selected in the Task Path drop-down list. Read-only Boolean.

Syntax

expression. PathDrivingPredecessor

expression A variable that represents a Task object.

Remarks

The Task.PathDrivingPredecessor property is related to the Driving Predecessors item on the Task Path drop-down list, on the FORMAT tab, under GANTT CHART TOOLS on the ribbon. Task path is primarily a formatting feature in the Project client, where tasks in the Gantt chart have colors that depend on the current task selection and the relationship of a specified task to the selection. In Figure 1, the Driving Predecessors and Driven Successors items are selected in the Task Path drop-down list. When you select T3, the Gantt Chart shows that T1 is a driving predecessor task and T4 is a driven successor task.

Figure 1. Using the task path properties to highlight tasks

The PathDrivingPredecessor property does not act like the Driving Predecessors selection in the user interface. Instead, the PathDrivingPredecessor property is True whenboth of the following conditions are true: (a) the task is a driving predecessor of the selected task, and (b) the Driving Predecessors item is selected in Task Path. You can manually select a task or use VBA to select a task, and then use VBA to check whether another task is a driving predecessor to the selected task. For example, if you select the third task as in Figure 1, and the Driving Predecessors item is selected in Task Path, the following statement prints True in the Immediate window of the VBE.

? ActiveProject.Tasks(1).PathDrivingPredecessor

However, if the Driving Predecessors item is not selected, the previous statement prints False. Project does not have a VBA method that can set items in the Task Path drop-down list.

Example

The TestTaskPath macro selects each task in a project, and then uses the four task path properties in turn to show how the other tasks relate to the selected task.

Option Explicit

Sub TestTaskPath()
    Dim t As Task
    Dim chkTsk As Task
    Dim selectedTaskId As Integer
    
    For Each t In ActiveProject.Tasks
        selectedTaskId = t.ID
        Application.SelectRow Row:=selectedTaskId, RowRelative:=False
            
        If Not (ActiveSelection.Tasks Is Nothing) Then
            Debug.Print
            
            With ActiveSelection.Tasks(1)
                Debug.Print "Selected task ID " & .UniqueID & ", name: " & .Name
            End With
                        
            For Each chkTsk In ActiveProject.Tasks
                If Not (chkTsk.ID = selectedTaskId) Then
                    If chkTsk.PathPredecessor Then
                        Debug.Print vbTab & chkTsk.Name & ": PathPredecessor"
                    End If
                    If chkTsk.PathDrivingPredecessor Then
                        Debug.Print vbTab & chkTsk.Name & ": PathDrivingPredecessor"
                    End If
                    If chkTsk.PathSuccessor Then
                        Debug.Print vbTab & chkTsk.Name & ": PathSuccessor"
                    End If
                    If chkTsk.PathDrivenSuccessor Then
                        Debug.Print vbTab & chkTsk.Name & ": PathDrivenSuccessor"
                    End If
                End If
            Next chkTsk
        End If
    Next t
End Sub

For the project in Figure 1, if the Predecessors, Driving Predecessors, Successors, and Driven Successors items are all selected in Task Path, the TestTaskPath macro has the following output:

Selected task ID 1, name: T1
    T2: PathSuccessor
    T2: PathDrivenSuccessor
    T3: PathSuccessor
    T3: PathDrivenSuccessor
    T4: PathSuccessor
    T4: PathDrivenSuccessor

Selected task ID 2, name: T2
    T1: PathPredecessor
    T1: PathDrivingPredecessor

Selected task ID 3, name: T3
    T1: PathPredecessor
    T1: PathDrivingPredecessor
    T4: PathSuccessor
    T4: PathDrivenSuccessor

Selected task ID 4, name: T4
    T1: PathPredecessor
    T1: PathDrivingPredecessor
    T3: PathPredecessor
    T3: PathDrivingPredecessor

Property value

VARIANT

See also

Task Object

PathDrivenSuccessor Property PathPredecessor Property PathSuccessor Property

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