How to install dll files

[SLA]

I'm trying to download a file and it keeps telling me the code execution cannot proceed because these dll files
avcodec_ash-57.dll
ashtech_libcurl.dll
adav2.dll
wxwidgets.dll
was not found

Please help me install them!!!!

[1720634730]

Hola muy buenas noches me podrían como puedo arreglar el problema de fallo del dll api-ms-win