在 JNA 中:

public interface User32 extends StdCallLibrary {
    User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class);

    int GetWindowTextA(PointerType hWnd, byte[] lpString, int nMaxCount);
}

使用它:

byte[] windowText = new byte[512];

PointerType hwnd = ... // assign the window handle here.
User32.INSTANCE.GetWindowTextA(hwnd, windowText, 512);
System.out.println(Native.toString(windowText));

您可能希望为 HWND 使用正确的结构映射并允许 unicode 支持；您可以在 JNA 网站上找到该信息和更多示例.

You'll probably want to use the proper structure mappings for HWND and also allow unicode support; you can find that information and more examples on how to do that at the JNA website.

GetWindowText 函数的文档位于 MSDN.

The documentation for GetWindowText function is available here in MSDN.

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