Using Programming Languages other than VBA

Sub Example_KeyLength()
		' This example encrypts and saves a file.
	
		Dim acad As New AcadApplication
		Dim sp As New AcadSecurityParams

		acad.Visible = True
		sp.Action = AcadSecurityParamsType.ACADSECURITYPARAMS_ENCRYPT_DATA 
		sp.Algorithm = AcadSecurityParamsConstants.ACADSECURITYPARAMS_ALGID_RC4
		sp.KeyLength = 40
		sp.Password = UCase("mypassword") 'AutoCAD converts all passwords to uppercase before applying them
		sp.ProviderName = "Microsoft Base Cryptographic Provider v1.0"
		sp.ProviderType = 1

		acad.ActiveDocument.SaveAs "C:\MyDrawing.dwg", , sp
End Sub