JNA的最新版本已经发生了一些变化应该解决这个问题（如JNA的作者之一，卢克Quinane）。如果使用最新版本并检查JNA
API，则会看到WinUser.WNDENUMPROC接口的方法实际上使用WinDef.HWND作为其参数，而不是long或int。
例如：
import com.sun.jna.Native;import com.sun.jna.Pointer;import com.sun.jna.platform.win32.WinDef.HWND;import com.sun.jna.platform.win32.WinUser;import com.sun.jna.platform.win32.WinUser.WNDENUMPROC;import com.sun.jna.win32.StdCallLibrary;public class TryWithHWND { public interface User32 extends StdCallLibrary { User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class); boolean EnumWindows(WinUser.WNDENUMPROC lpEnumFunc, Pointer arg); int GetWindowTextA(HWND hWnd, byte[] lpString, int nMaxCount); } public static void main(String[] args) { final User32 user32 = User32.INSTANCE; user32.EnumWindows(new WNDENUMPROC() { int count = 0; @Override public boolean callback(HWND hWnd, Pointer arg1) { byte[] windowText = new byte[512]; user32.GetWindowTextA(hWnd, windowText, 512); String wText = Native.toString(windowText); // get rid of this if block if you want all windows regardless of whether // or not they have text if (wText.isEmpty()) { return true; } System.out.println("Found window with text " + hWnd + ", total " + ++count + " Text: " + wText); return true; } }, null); }}
