Mapx 的专题图用户可以进行完全的定制，下面是自定义范围专题图的例子。
Dim ds As New MapXLib.Dataset
Dim thm As New MapXLib.Theme
Set ds = Formmain.Map1.Datasets(ToolBars.Combo2.Text)
Set thm = ds.Themes.add(0, "aa", "aa", False)
thm.Legend.Compact = False
thm.AutoRecompute = False
'thm.ComputeTheme = False
thm.DataMax = 700
thm.DataMin = 100
thm.ThemeProperties.AllowEmptyRanges = True
thm.ThemeProperties.NumRanges = 7
thm.ThemeProperties.DistMethod = miCustomRanges
thm.ThemeProperties.RangeCategories(1).Max = 150
thm.ThemeProperties.RangeCategories(1).Min = 50
thm.ThemeProperties.RangeCategories(2).Max = 250
thm.ThemeProperties.RangeCategories(2).Min = 150
thm.ThemeProperties.RangeCategories(3).Max = 350
thm.ThemeProperties.RangeCategories(3).Min = 250
thm.ThemeProperties.RangeCategories(4).Max = 450
thm.ThemeProperties.RangeCategories(4).Min = 350
thm.ThemeProperties.RangeCategories(5).Max = 550
thm.ThemeProperties.RangeCategories(5).Min = 450
thm.ThemeProperties.RangeCategories(6).Max = 650
thm.ThemeProperties.RangeCategories(6).Min = 550
thm.ThemeProperties.RangeCategories(7).Max = 750
thm.ThemeProperties.RangeCategories(7).Min = 650
'thm.ComputeTheme = True
thm.AutoRecompute = True
thm.Visible = True