'For each GRD in the specified directory, the script creates a new window, a contour map in the window, saves and closes the SRF file.
'Then repeats for the next GRD in the directory.

Sub Main

''''''''''''' User Variables ''''''''''''''''''
'You must enter the path to the grid files and the name of the BLN file

file_directory	= "C:\program files\golden software\surfer 15\samples\"   'make sure has a trailing \

file_extension	= "grd"  'no "." preceding the extension

'''''''''''''''''''''''''''''''''''''''''''''''

'Opens Surfer
	Set SurferApp = CreateObject("surfer.application")
	SurferApp.Visible = True 'Progress for each file can be seen in the status bar of the application.

'Start the loop
	file_extension	= LCase(Right(file_extension,(Len(file_extension) - InStrRev(file_extension,"."))))
	If  Len(file_directory)-InStrRev(file_directory,"\") <> 0 Then file_directory = file_directory + "\"

	grid_file = Dir( file_directory  + "*." + file_extension)

	On Error GoTo FileError
	While grid_file <> ""
		'Opens new Surfer window
			Dim Plot As Object
			Set Plot = SurferApp.Documents.Add
		'Creates the map
			Dim MapFrame As Object
			Set MapFrame = Plot.Shapes.AddContourMap(GridFileName:=file_directory + grid_file)
		'Saves the file as SRF
			Plot.SaveAs (file_directory + Left(grid_file, Len(grid_file)-(Len(grid_file)-InStrRev(grid_file,".")+1) )  +".srf")
		Debug.Print grid_file
			Plot.Close
		grid_file = Dir() 'get next file
	Wend

'Closes Surfer
	SurferApp.Quit
	Exit Sub

'Error instructions
	FileError:
	Debug.Print  "Error:	" + grid_file + "						" + Err.Description
	Resume Next

End Sub