Sub ChangeMaintenanceWindowProperties(connection, 							 _
									targetCollectionID, 					 _
									targetServiceWindowID, 						_
									newMaintenanceWindowDescription, 		_
									newMaintenanceWindowServiceWindowSchedules, _
									newMaintenanceWindowIsEnabled)
									 
	' Get the specific collection settings instance.
	Set collectionSettingsInstance = connection.Get("SMS_CollectionSettings.CollectionID='" & targetCollectionID &"'" )
		
	' Populate the local array list with the existing service window objects (from the target collection).
	tempMaintenanceWindowArray = collectionSettingsInstance.ServiceWindows 

	' Enumerate through the array list to access each maintenance window object.
	For Each maintenanceWindow in tempMaintenanceWindowArray
   
		 ' If the service window ID matches the one passed in to the function, change the specific values.
		 If maintenanceWindow.ServiceWindowID = targetServiceWindowID Then	
				 
			' Populate retrieved SMS_ServiceWindow object with the new maintenance window values.
			maintenanceWindow.Description = newMaintenanceWindowDescription
			maintenanceWindow.ServiceWindowSchedules = newMaintenanceWindowServiceWindowSchedules
			maintenanceWindow.IsEnabled = newMaintenanceWindowIsEnabled	
	
		 End If
	
	Next

	' Replace the existing service window objects from the target collection with the temporary array that includes the modified service window.
	collectionSettingsInstance.ServiceWindows = tempMaintenanceWindowArray

	' Save the new values in the collection settings instance associated with the collection ID.
	collectionSettingsInstance.Put_

	' Output success message.
	wscript.echo "Maintenance Window " & targetServiceWindowID & " modified."

End Sub

public void ChangeMaintenanceWindowProperties(WqlConnectionManager connection,
											string targetCollectionID,
											string serviceWindowID,
											string newMaintenanceWindowDescription)
{
	try
	{
		// Create a new array list to hold the service window objects.
		List<IResultObject> tempMaintenanceWindowArray = new List<IResultObject>();

		// Establish connection to collection settings instance associated with the Collection ID.
		IResultObject collectionSettings = connection.GetInstance(@"SMS_CollectionSettings.CollectionID='" + targetCollectionID + "'");

		// Populate the array list with the existing service window objects (from the target collection).
		tempMaintenanceWindowArray = collectionSettings.GetArrayItems("ServiceWindows");

		// Enumerate through the array list to access each maintenance window object.
		foreach (IResultObject maintenanceWindow in tempMaintenanceWindowArray)
		{
			// If the service window ID matches the one passed in to the function, change the specific values.
			if (maintenanceWindow["ServiceWindowID"].StringValue == serviceWindowID)
			{
				maintenanceWindow["Description"].StringValue = newMaintenanceWindowDescription;
				break;
		}
	}

		// Replace the existing service window objects from the target collection with the temporary array that includes the new service window.
		collectionSettings.SetArrayItems("ServiceWindows", tempMaintenanceWindowArray);

		// Save the new values in the collection settings instance associated with the Collection ID.
		collectionSettings.Put();
}
	catch (SmsException ex)
	{
		Console.WriteLine("Failed. Error: " + ex.InnerException.Message);
		throw;
}
}