Sample to create toolbar on right with four custom button images:
Sub Aut

pen()
savestate = ActiveWorkbook.Saved
On Error Resume Next
NumTools = 4
For i = 1 To NumTools
pn = "Picture" & Application.Trim(Str(i))
Sheets("Variables"

.DrawingObjects(pn).Width = 16
Sheets("Variables"

.DrawingObjects(pn).Height = 15
Next i
tb = "CJERPT Toolbar"
Appplication.Toolbars(tb).Delete
On Error GoTo ErrorHandler
Application.Toolbars.Add (tb)
Name1 = "Open 1st month and format"
Name2 = "Open 2nd month and format"
Name3 = "Prepare the CJE report"
Name4 = "Save the report"
With Application.Toolbars(tb)
.ToolbarButtons.Add 231, , "GetMonthOne"
.ToolbarButtons.Add 231, , "GetMonthTwo"
.ToolbarButtons.Add 231, , "MakeStuff"
.ToolbarButtons.Add 231, , "Save_RPT"
.ToolbarButtons(1).Name = Name1
.ToolbarButtons(2).Name = Name2
.ToolbarButtons(3).Name = Name3
.ToolbarButtons(4).Name = Name4
End With
For i = 1 To NumTools
Sheets("Variables"

.DrawingObjects("Picture " & i).Copy
Toolbars(tb).ToolbarButtons(i).PasteFace
Next i
Application.Toolbars(tb).Position = xlRight
With Application.Toolbars(tb)
.Width = 141
.Top = 1
.Left = 1
.Visible = True
End With
ErrorHandler:
On Error Resume Next
Application.Toolbars(tb).Visible = True
Application.Toolbars(tb).Position = xlRight
ActiveWorkbook.Saved = savestate
End Sub