Did you try searching for the file? Do you have it? If so, what version and where in the filesystem?
I know nothing of programming. But when a .dll is missing, sometimes it works to download it from internet (there are pages with thousands of .dll), and putting it in \system or \system64. You may try that.
That file, I think I found missing in other game, long ago, but can't rememeber anymore about. Maybe reinstalling DirectX?
Also, give some more information of your O.S. to the expert people, they might help you too.
And you can email support@stardock.com