Sub Main

'Declare the variable that will reference the application
	Dim SurferApp As Object
	Set SurferApp = CreateObject("Surfer.Application")
	SurferApp.Visible = True

'Declares Plot as an object
	Dim Plot As Object
	Set Plot = SurferApp.Documents.Add

'Creates the first post map
	Set MapFrame = Plot.Shapes.AddPostMap(SurferApp.Path + "\samples\demogrid.dat")

'Declares PostMap1 as an Object and assigns the post map to variable "PostMap1"
	Dim PostMap1 As Object
	Set PostMap1 = MapFrame.Overlays(1)

'Changes the name of the post map to Demo and changes the symbol color.
	PostMap1.Name = "Demo"
	PostMap1.Symbol.Color = srfColorGreen

'Creates a second post map
	Set MapFrame2 = Plot.Shapes.AddPostMap(SurferApp.Path + "\samples\sample1.dat")

'Declares PostMap1 as an Object and assigns the post map to variable "PostMap1"
	Dim PostMap2 As Object
	Set PostMap2 = MapFrame2.Overlays(1)

'Changes the name and symbol color of the second post map
	PostMap2.Name = "Sample"
	PostMap2.Symbol.Color = srfColorBlue

'Overlays the two post maps
	Plot.Shapes.SelectAll
	Set Sel = Plot.Selection
	Sel.OverlayMaps
	Sel.DeselectAll
	
'Turns off the visibility of the second post map
	Plot.Shapes.Item(1).Overlays("Sample").Visible = False

End Sub