How do I install the d3dx9_43.dll for ACS?
SharpDX is used to access the DirectX API under the .NET platform. SharpDX is using the DirectX library d3dx9_43.dll. If this is not present on your client PC, you may have to update your DirectX (not Managed DirectX).
Search for the latest version of DirectX on the Microsoft website: http://www.microsoft.com/download/en/search.aspx?q=directx