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java - 如何获取子窗口的所有标题？

问题描述

我有一个带有文本的窗口。当我在 Microsoft Spy++ 程序中找到此窗口时，此文本显示为其子窗口的标题。 在此处输入图像描述 我有这个代码：

interface User32 extends StdCallLibrary {
    User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class);
    int WM_SETTEXT = 0x000c;
    int WM_GETTEXT = 0x000D;

    HWND FindWindowA(String lpClassName, String lpWindowName);
    HWND FindWindowExA(HWND hwndParent, HWND hwndChildAfter, String lpClassName,
                       String lpWindowName);
    LRESULT SendMessageA(HWND paramHWND, int paramInt, WPARAM paramWPARAM, LPARAM paramLPARAM);
    LRESULT SendMessageA(HWND editHwnd, int wmGettext, long l, byte[] lParamStr);
    int GetClassNameA(HWND hWnd, byte[] lpString, int maxCount);
}

public static void main(String[] args) {
    User32 user32 = User32.INSTANCE;

    HWND zavhwnd = com.sun.jna.platform.win32.User32.INSTANCE.FindWindow
            (null, "ZAV - 1.0.05");

    HWND editHwnd = user32.FindWindowExA(zavhwnd, null, 
            "WindowsForms10.RichEdit20W.app.0.2004eee", null);

    byte[] lParamStr = new byte[512];
    LRESULT resultBool = user32.SendMessageA(editHwnd, User32.WM_GETTEXT, 512, lParamStr);

    System.out.println("string: "+Native.toString(lParamStr));
}

它找到了那个窗口（zavhwnd），因为它不为空，但我仍然无法阅读我想要的文本。如果它检索子窗口的所有标题会更好，因为“WindowsForms10.RichEdit20W.app.0.2004eee”类可能并不总是相同的。有人可以帮我吗？

标签： javajna

解决方案

我已经找到了如何做到这一点：

interface ExtendedStdLib extends StdCallLibrary {
    ExtendedStdLib INSTANCE = (ExtendedStdLib) Native.load("user32", ExtendedStdLib.class);
    int WM_SETTEXT = 0x000c;
    int WM_GETTEXT = 0x000D;

    HWND FindWindowA(String lpClassName, String lpWindowName);
    HWND FindWindowExA(HWND hwndParent, HWND hwndChildAfter, String lpClassName,
                       String lpWindowName);
    LRESULT SendMessageA(HWND paramHWND, int paramInt, WPARAM paramWPARAM, LPARAM paramLPARAM);
    LRESULT SendMessageA(HWND editHwnd, int wmGettext, long l, byte[] lParamStr);
    int GetClassNameA(HWND hWnd, byte[] lpString, int maxCount);
}

public void getSelectableText() {
    ExtendedStdLib EXT_INSTANCE = ExtendedStdLib.INSTANCE;

    HWND zavhwnd = User32.INSTANCE.FindWindow(null, "{Window Title}");
    if (zavhwnd == null) {
        log.error("Window wasn't found");
        return;
    }

    User32.INSTANCE.EnumChildWindows(zavhwnd, (hwnd, pntr) -> {
        char[] textBuffer = new char[512];
        char[] textBuffer2 = new char[512];
        User32.INSTANCE.GetClassName(hwnd, textBuffer, 512);
        User32.INSTANCE.GetWindowText(hwnd, textBuffer2, 512);
        String wText = Native.toString(textBuffer);
        String wText2 = Native.toString(textBuffer2);
        if (wText.contains("RichEdit")) {
            byte[] lParamStr = new byte[2048];
            LRESULT resultBool = EXT_INSTANCE.SendMessageA(hwnd, ExtendedStdLib.WM_GETTEXT, 2048, lParamStr);
            String text = Native.toString(lParamStr, "windows-1250");
        }
        return true;
    }, null);
}

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