Here's the sample code for DisplayDataMap in the Help file.. this is a very versatile method, there's a lot in the documentation.
Code:
Sub CreateShadedAreaMapUsingMapPointDemographics()
Dim objApp As New MapPoint.Application
Dim objDataSet As MapPoint.DataSet
Dim objDataMap As MapPoint.DataMap
Dim objField As MapPoint.Field
'Set up application and objects to use
objApp.Visible = True
objApp.UserControl = True
Set objDataSet = objApp.ActiveMap.DataSets.GetDemographics()
Set objField = objDataSet.Fields("Households (1980)")
'Create the data map, and give it a name
Set objDataMap = _
objDataSet.DisplayDataMap(geoDataMapTypeShadedArea, _
objField, geoShowByRegion1, geoCombineByDefault, _
geoRangeTypeDiscreteEqualRanges, geoRangeOrderDefault, 15)
objDataMap.LegendTitle = "State Households"
End Sub
Eric