Make A Class Recognize That An Interface Found In Separate File Exists?

Mar 8, 2010

I've made an interface called ApprovalEvent in a separate file with the namespace myproject... I've also made a class called PurchaseOrder... it's also in the same namespace, just in a separate file. Whenever I try to make PurchaseOrder implement ApprovalEvent it always says that ApprovalEvent is undefined...

How can I make the class recognize that the interface exists but is in a different file?[code]...

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[code]....

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Code:
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[code]....

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[code].....

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[CODE]...

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[Code]...

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