如何更改Windows用户的区域设置/日期格式？

我用VB6 / COM +应用程序，它输出的基础上在控制面板，区域设置的短日期设置，日期/时间值，为运行它的用户。该程序，然后分析该输出有预计的日期格式可配置的设置，并在UI呈现。

I use a VB6/COM+ application which outputs date/time values based on the short date settings in the Control Panel, Regional Settings, for the user that runs it. The program that then parses that output has a configurable setting for the date format it expects, and presents in the UI.

例如。如果用户的区域设置为MM / DD / YYYY，它输出2008.02.04，期待18/06/2009申请失败字符串未被识别为有效的DateTime。

e.g. If the regional setting for the user is set to mm/dd/yyyy, and it outputs 06/18/2009, the application expecting "18/06/2009" fails with "String was not recognized as a valid DateTime".

由于我们平时运行该应用程序作为服务帐户，这是我们不作为交互式登录创建一个配置文件，我们一般设置正确的日期格式，然后勾选应用所有设置为当前用户帐户和默认用户配置文件选项。

As we usually run this application as a service account, which we have not logged in as interactively to create a profile, we generally set the correct date format and then tick the "Apply all settings to the current user account and the default user profile" option.

我想是让我为这个烂摊子编写的C＃配置实用程序能够以编程设定的日期格式，交给用户。

I would like to be make the C# configuration utility I have written for this mess to be able to set the date format programmatically for a given user.

修改
我想无非就是改代码，但没有在这个时候这样做的能力。

Edit I would like nothing more than to change the code, but do not have the ability to do so at this time.

我也知道，我所问的是一个坏事情。至于它应该是用户的选择 - 我上午用户，我明确地创建它的任务;我只是想通过一个脚本方法来设置日期格式，而不是做一下自己。

I also know that what I am asking is a bad thing to do. With regards to "it should be the user's choice" - I am that user, as I create it explicitly for the task; I just want to set the date format by a scripted method, rather than having to do the clicking myself.