https://blog.faceutil.com/2017/04/29/%ec%bb%b4%ed%93%a8%ed%84%b0%ec%a0%95%eb%b3%b4-d3dx9_25-dll-%ec%98%a4%eb%a5%98-d3dx9_25-dll-%eb%8b%a4%ec%9a%b4-%e3%82%b1/