参考海康威视Java版示例（采用Jna实现）
获得win32原生窗口句柄：HWND hwnd = new HWND(Native.getComponentPointer(panelRealplay));
JAVA JNA WindowProc implementation:
http://*.com/questions/4678247/java-jna-windowproc-implementation
使用 JNA 使 Java Swing 程序接收 Win32 自定义消息
http://blog.chinaunix.net/uid-631975-id-3291530.html
Bridge the gap between Java and Twain
Integrate imaging devices in Java using Twain and JNI
http://www.javaworld.com/article/2074455/java-app-dev/bridge-the-gap-between-java-and-twain.html