I use VB.NET to create a MS Project Instance and use this Instance to add task, and set task's Name, Start and Finish, the Project file is created successfully, and the Duration value will be automatically generated by Project, but if I change the Duration
value in Project, the Finish date isn't correct, for example, if I set the the Start is "10/21/2014" and Finish is "10/31/2014", the generated Project file has a Duration value is "9 days", and if I change the Duration value to"2 days", the Finish date will be changed to "10/21/2014", why this problem happen? I have no idea about this problem.
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