Function winapi::um::winbase::GetFirmwareEnvironmentVariableExA

pub unsafe extern "system" fn GetFirmwareEnvironmentVariableExA(
    lpName: LPCSTR, 
    lpGuid: LPCSTR, 
    pBuffer: PVOID, 
    nSize: DWORD, 
    pdwAttribubutes: PDWORD
) -> DWORD