Function winapi::um::winbase::CopyFileExA

pub unsafe extern "system" fn CopyFileExA(
    lpExistingFileName: LPCSTR, 
    lpNewFileName: LPCSTR, 
    lpProgressRoutine: LPPROGRESS_ROUTINE, 
    lpData: LPVOID, 
    pbCancel: LPBOOL, 
    dwCopyFlags: DWORD
) -> BOOL