SDL.dll - 32-, 64- , dll /Windows/SysWOW64/, /Windows/System32/, 64- DLL.
EDIT:
, DLL, System32, , , . , DLL, , .
Instead, copy the DLLs to the same directory as the executable. If you create and execute using Visual Studio, it will look for a DLL in the Project directory, where your source files are likely to be located.
source
share