• If the exBarHAlignCaption property is 0,1 or 2 the caption is not clipped and it is aligned to the left, center or right side of the bar.
• If the exBarHAlignCaption property is 3, 4 or 5 the caption of the bar gets clipped to the bar area, else the caption is aligned to the left, center or right side of the bar.
• If the exBarHAlignCaption property includes the AlignmentEnum.exHOutside the caption is displayed outside of the bar to the left or to the right. For instance, if the exBarHAlignCaption property is AlignmentEnum.LeftAlignment OR AlignmentEnum. exHOutside, the caption is displayed outside of the bar in the left side of the bar. If the exBarHAlignCaption property is AlignmentEnum.RightAlignment OR AlignmentEnum. exHOutside, the caption is displayed outside of the bar in the right side of the bar. 

By default, the exBarHAlignCaption is CenterAlignment. (AlignmentEnum expression)

The representation of the exBarEffort value depends on the HistogramType property as follow:

• exHistOverload, the exBarEffort value represents the effort to execute an unit in the bar. For instance, if the bars display activities the exBarEffort value may represent the number of workers for each activity so the overload histogram displays the total number of workers on the activity.

The following screen shot shows the exHistOverload histogram when exBarEffort property is 1 ( by default ):

The following screen shot shows the exHistOverload histogram when exBarEffort property is different for bars as seen in the columns section: 

• exHistOverAllocation, the exBarEffort value defines the workload to show in the exHistOverAllocation histogram. The work-load for a task is computed as exBarEffort / length of the bar. The work-load for the task is the work effor / task duration. (i.e. If  item.exBarEffort = 1 and gantt bar length is 10 days, then the work-load = 0.1 or 10%). The histogram- graph shows the sum of the work-loads (the work-load of each task item is added, unit by unit). 

The following screen shot shows the exHistOverallocation histogram when exBarEffort property is 1 ( by default ):

The following screen shot shows the exHistOverallocation histogram when exBarEffort property is different for bars as seen in the columns section: 

(Float expression)

By default, the exSummaryBarBackColor property is 0, which means that it has no effect. 

If the exSummaryBarBackColor property is set to a non- zero value it indicates the background color for the portion of the summary bar as seen in the following screen shot:

The following screen shot shows the bars that belongs to a summary bars using EBN colors and semi-transparent (exSummaryBarBackColorTransparent = 50):

The exBarBackColor property specifies the background color for the portion occupied by the bar, while the exBarColor property specifies the bar's color.  (Color expression)

The following screen shot displays the bars that belongs to a summary bar using a semi-transparent color ( so the non-working portion is visible )

(Long expression between 0-opaque, 100-transparent)

This option has effect only if:

• AllowNonworkingBars property is True.
• ItemNonworkingUnits property is not empty, and points to a valid expression. The ItemNonworkingUnits property indicates a repetitive expression to determine the parts of the item being non-working. 

In other words, the exBarTreatAsNonworking bars are treated as regular bars if the AllowNonworkingBars property is False, or if ItemNonworkingUnits property is empty (boolean expression).

The color to specify the bar in the overview area is used as follows:

• If exBarOverviewColor is not 0, the exBarOverviewColor indicates the color to show the bar in the overview area, else
• If the exBarColor is not 0, the  exBarColor indicates the color to show the bar in the overview area, else
• the Color property of the Bar indicates the color to show the bar in the overview part of the control.

(Color expression)

The following VB sample lists the start and end date-time values for non-working parts of the bar ( for the /COM version ):

Private Sub G2antt1_BarResize(ByVal item As EXG2ANTTLibCtl.HITEM, ByVal Key As Variant)
    Debug.Print "Non-working parts of the bar:"
    With G2antt1.Items
        Dim i As Variant, j As Long
        For Each i In .ItemBar(item, Key, exBarNonWorkingUnits)
            Debug.Print IIf(j Mod 2 = 0, "Start ", "End ") & i
            j = j + 1
        Next
    End With
End Sub

The following VB/NET sample lists the start and end date-time values for non-working parts of the bar ( for the /NET Assembly version ):

Private Sub Exg2antt1_BarResize(ByVal sender As System.Object, ByVal Item As System.Int32, ByVal Key As System.Object) Handles Exg2antt1.BarResize
    Debug.Print("Non-working parts of the bar:")
    With Exg2antt1.Items
        Dim i As Object, j As Long
        For Each i In .get_BarNonWorkingUnits(Item, Key)
            Debug.Print(IIf(j Mod 2 = 0, "Start ", "End ") & i)
            j = j + 1
        Next
    End With
End Sub

( safe array of pairs of dates indicating the start and end of the non-working area )

The following VB sample lists the start and end date-time values for non-working parts of the bar ( for the /COM version ):

Private Sub G2antt1_BarResize(ByVal item As EXG2ANTTLibCtl.HITEM, ByVal Key As Variant)
    Debug.Print "Non-working parts of the bar:"
    With G2antt1.Items
        Debug.Print .ItemBar(item, Key, exBarNonWorkingUnitsAsString)
    End With
End Sub

The following VB/NET sample lists the start and end date-time values for non-working parts of the bar ( for the /NET Assembly version ):

Private Sub Exg2antt1_BarResize(ByVal sender As System.Object, ByVal Item As System.Int32, ByVal Key As System.Object) Handles Exg2antt1.BarResize
    Debug.Print("Non-working parts of the bar:")
    With Exg2antt1.Items
        Debug.Print(.get_BarNonWorkingUnitsAsString(Item, Key))
    End With
End Sub

(String expression)

The following VB sample lists the start and end date-time values for working parts of the bar ( for the /COM version ):

Private Sub G2antt1_BarResize(ByVal item As EXG2ANTTLibCtl.HITEM, ByVal Key As Variant)
    Debug.Print "Working parts of the bar:"
    With G2antt1.Items
        Dim i As Variant, j As Long
        For Each i In .ItemBar(item, Key, exBarWorkingUnits)
            Debug.Print IIf(j Mod 2 = 0, "Start ", "End ") & i
            j = j + 1
        Next
    End With
End Sub

The following VB/NET sample lists the start and end date-time values for working parts of the bar ( for the /NET Assembly version ):

Private Sub Exg2antt1_BarResize(ByVal sender As System.Object, ByVal Item As System.Int32, ByVal Key As System.Object) Handles Exg2antt1.BarResize
    Debug.Print("Working parts of the bar:")
    With Exg2antt1.Items
        Dim i As Object, j As Long
        For Each i In .get_BarWorkingUnits(Item, Key)
            Debug.Print(IIf(j Mod 2 = 0, "Start ", "End ") & i)
            j = j + 1
        Next
    End With
End Sub

( safe array of pairs of dates indicating the start and end of the working area )

The following VB sample lists the start and end date-time values for working parts of the bar ( for the /COM version ):

Private Sub G2antt1_BarResize(ByVal item As EXG2ANTTLibCtl.HITEM, ByVal Key As Variant)
    Debug.Print "Working parts of the bar:"
    With G2antt1.Items
        Debug.Print .ItemBar(item, Key, exBarWorkingUnitsAsString)
    End With
End Sub

The following VB/NET sample lists the start and end date-time values for working parts of the bar ( for the /NET Assembly version ):

Private Sub Exg2antt1_BarResize(ByVal sender As System.Object, ByVal Item As System.Int32, ByVal Key As System.Object) Handles Exg2antt1.BarResize
    Debug.Print("Working parts of the bar:")
    With Exg2antt1.Items
        Debug.Print(.get_BarWorkingUnitsAsString(Item, Key))
    End With
End Sub

(String expression)

The following VB sample adds a single extra caption in the right side of the bar:

With G2antt1.Items
    .ItemBar(.FocusItem, .FirstItemBar(.FocusItem), exBarExtraCaption) = "right"
    .ItemBar(.FocusItem, .FirstItemBar(.FocusItem), exBarExtraCaptionHAlign) = RightAlignment Or exHOutside
End With

The following VB sample adds two extra captions, one in the left side, and one to the right side:

With G2antt1.Items
    .ItemBar(.FocusItem, .FirstItemBar(.FocusItem), exBarExtraCaption) = Array("left", "right")
    .ItemBar(.FocusItem, .FirstItemBar(.FocusItem), exBarExtraCaptionHAlign) = Array(LeftAlignment Or exHOutside, RightAlignment Or exHOutside)
End With

When retrieving the exBarExtraCaption returns the extra caption, if there is only, one, else it returns a safe arrea ( collection ) of string that indicates the extra captions of the bar.

The following VB/NET sample adds a single extra caption in the right side of the bar:

With Exg2antt1.Items
    .set_BarExtraCaption(.FocusItem, .get_FirstItemBar(.FocusItem), "right")
    .set_BarExtraCaptionHAlign(.FocusItem, .get_FirstItemBar(.FocusItem), exontrol.EXG2ANTTLib.AlignmentEnum.RightAlignment Or exontrol.EXG2ANTTLib.AlignmentEnum.exHOutside)
End With

The following VB/NET sample adds two extra captions, one in the left side, and one to the right side:

With Exg2antt1.Items
    .set_BarExtraCaption(.FocusItem, .get_FirstItemBar(.FocusItem), New String() {"left", "right"})
    .set_BarExtraCaptionHAlign(.FocusItem, .get_FirstItemBar(.FocusItem), _
    New exontrol.EXG2ANTTLib.AlignmentEnum() {exontrol.EXG2ANTTLib.AlignmentEnum.LeftAlignment Or exontrol.EXG2ANTTLib.AlignmentEnum.exHOutside, _
        exontrol.EXG2ANTTLib.AlignmentEnum.RightAlignment Or exontrol.EXG2ANTTLib.AlignmentEnum.exHOutside})
End With

The following C# sample adds a single extra caption in the right side of the bar:

exontrol.EXG2ANTTLib.Items items = exg2antt1.Items;
items.set_BarExtraCaption(items.FocusItem, items.get_FirstItemBar(items.FocusItem), "right");
items.set_BarExtraCaptionHAlign(items.FocusItem, items.get_FirstItemBar(items.FocusItem), exontrol.EXG2ANTTLib.AlignmentEnum.RightAlignment | exontrol.EXG2ANTTLib.AlignmentEnum.exHOutside);

The following C# sample adds two extra captions, one in the left side, and one to the right side:

exontrol.EXG2ANTTLib.Items items = exg2antt1.Items;
items.set_BarExtraCaption(items.FocusItem, items.get_FirstItemBar(items.FocusItem), 
    new string[2] { "left", "right" });
items.set_BarExtraCaptionHAlign(items.FocusItem, items.get_FirstItemBar(items.FocusItem), 
    new exontrol.EXG2ANTTLib.AlignmentEnum[2] { exontrol.EXG2ANTTLib.AlignmentEnum.LeftAlignment | exontrol.EXG2ANTTLib.AlignmentEnum.exHOutside, 
        exontrol.EXG2ANTTLib.AlignmentEnum.RightAlignment | exontrol.EXG2ANTTLib.AlignmentEnum.exHOutside });

( string expression or safe array of string expressions )

The following VB/NET sample displays the bars being grouped with selected bar(s):

With Exg2antt1.Items
    Dim sSelected As List(Of exontrol.EXG2ANTTLib.Items.SelectedBar) = .get_SelectedBars()
    If Not sSelected Is Nothing Then
        Dim s As exontrol.EXG2ANTTLib.Items.SelectedBar
        For Each s In sSelected
            Debug.Print(s.Key & " from " & .get_CellCaption(s.Item, 0))
            Dim sGrouped As List(Of exontrol.EXG2ANTTLib.Items.SelectedBar) = .get_BarsGroup(s.Item, s.Key)
            If Not sGrouped Is Nothing Then
                Dim b As exontrol.EXG2ANTTLib.Items.SelectedBar
                For Each b In sGrouped
                    Debug.Print(vbTab & b.Key & " from " & .get_CellCaption(b.Item, 0))
                Next
            End If
        Next
    End If
End With