C++/CX, WinRT, PPL, and C all in one snippet!

    create_task(
        KnownFolders::DocumentsLibrary->CreateFileAsync(
            L"KatchupDatabase.kat",
            CreationCollisionOption::OpenIfExists
        )
    ).then([&](StorageFile^ file) {
        if(!file) {
            throw task_canceled("Unable to create database file.");
        }

        wstring wfilePath = file->Path->Data();
        string filePath;
        filePath.assign(begin(wfilePath), end(wfilePath));

        char* err = nullptr;
        sqlite3* db = nullptr;
        sqlite3_open(filePath.c_str(), &db);
        auto rc = sqlite3_exec(db, "CREATE TABLE t(x INTEGER PRIMARY KEY ASC, y, z);", nullptr, nullptr, &err);
        if(rc != SQLITE_OK) {
            cout << err << endl;
            sqlite3_free(err);
        }
        sqlite3_close(db);
    });