Teamviewers QuickConnect的按钮是如何实现的？ [英] How is Teamviewers Quickconnect button accomplished?

问题描述

对于那些你们谁不知道我在说什么：
<一href=\"http://www.teamviewer.com/images/$p$psse/quickconnect_en.jpg\">http://www.teamviewer.com/images/$p$psse/quickconnect_en.jpg

For those of you who do not know what I am talking about: http://www.teamviewer.com/images/presse/quickconnect_en.jpg

Teamviewer覆盖所有的窗户，按钮，让您快速与别人共用一个窗口。我想关于实施类似的东西任何想法 - 如果你有例如code，甚至更好（特别是按钮 - 而不是共享）。我感兴趣的是C ++和Qt ......但如果​​有任何我有兴趣用不同的语言/库好的解决办法。

Teamviewer overlays that button on all windows to allow you to quickly share a window with someone else. I would like any ideas on implementing something similar -- if you have example code, even better (specifically, the button -- not the sharing). I am interested in C++ and QT... but I would be interested in good solutions in other languages/libraries if there are any.

感谢。

推荐答案

要画按钮或在国外的窗户其他的东西，你需要注入code到国外的过程。
检查 SetWindowsHookEx函数该方法：

To draw buttons or other stuff in foreign windows, you need to inject code into the foreign processes. Check the SetWindowsHookEx method for that:

您最想安装一个WH_CALLWNDPROCRET钩和提防的 WM_NCPAINT 消息。这将是绘制按钮正确的地方。
不过，我真的不知道，如果你可以将非客户区域内的窗口，因此在最坏的情况下，你必须画的按钮，手动。

You most probably want to install a hook for WH_CALLWNDPROCRET and watch out for the WM_NCPAINT message. This would be the right place to draw your button. However, I'm not really sure, if you can place a window within a Non-Client-Area, so in the worst case, you'd have to paint the button "manually".

刚刚从主应用程序调用这个（或从一个DLL中）

Just call this from your main application (or from within a DLL)

SetWindowsHookEx函数（WH_CALLWNDPROCRET，myCallWndRetProc，HMODULE，0）;

注意myCallWndRetProc必须驻留在DLL中和HMODULE是模块句柄此DLL。

Note that myCallWndRetProc must reside within a DLL and hModule is the Module-HANDLE for this DLL.

您myCallWndRetProc可能看起来像：

Your myCallWndRetProc could look like:

LRESULT CALLBACK myCallWndRetProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (nCode == HT_ACTION) {
        CWPRETSTRUCT* cwpret = (CWPRETSTRUCT*)lParam;
        if (cwpret->message == WM_NCPAINT) {
            // The non-client area has just been painted.
            // Now it's your turn to draw your buttons or whatever you like
        }
    }
    return CallNextHookEx(0, nCode, wParam, lParam);
}

当你起执行，我建议，你只需创建一个简单的对话框的应用程序和钩自己的过程只：

When starting with your implementation, I'd suggest, you just create a simple dialog application and hook your own process only:

SetWindowsHookEx(WH_CALLWNDPROCRET, myCallWndRetProc, NULL, GetCurrentThreadId());

安装全局钩子注入DLL的到所有进程，这使得调试pretty辛苦，您的DLL可能被写保护，而它在使用中。

Installing a global hook injects the DLL into all processes, which makes debugging pretty hard, and your DLL may be write-protected while it's in use.

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