D3dx3 30.dll.

Let’s break down what d3dx3_30.dll contains (educated reconstruction based on D3DX8 architecture):

Are you seeing this error with a or while trying to launch a certain application ? Location of DLL files - Microsoft Q&A d3dx3 30.dll.

Yes, but the 32-bit version of the DLL must be placed in C:\Windows\SysWOW64 (the 32-bit subsystem on 64-bit Windows). The DirectX Web Installer handles this automatically. Let’s break down what d3dx3_30