Windows 7/8屏幕覆盖VC ++ [英] Windows 7/8 Screen overlay VC++

问题描述

我正在开发一个应用程序，该应用程序将显示Windows中的OSD等东西(图形，文本等).问题是我是Windows编程的新手，找不到合适的解决方案.

I am working on an application that would display things(graphics, texts, etc) like an OSD in Windows. The problem is that I am a newbie in windows programming and I couldn't find any proper solution.

我尝试过的事情:

1:我尝试使用 WS_EX_LAYERED 标志创建一个分层的窗口:

1: I tried to create a layered window with the WS_EX_LAYERED flag:

CreateWindowEx(WS_EX_LAYERED | WS_EX_TRANSPARENT | WS_EX_TOPMOST |WS_EX_TOOLWINDOW，szWindowClass，NULL，WS_POPUP |WS_VISIBLE |WS_SYSMENU，0、0、0、0，hWndDesktop，NULL，hInstance，NULL);

CreateWindowEx(WS_EX_LAYERED | WS_EX_TRANSPARENT | WS_EX_TOPMOST | WS_EX_TOOLWINDOW, szWindowClass, NULL, WS_POPUP | WS_VISIBLE | WS_SYSMENU, 0, 0, 0, 0, hWndDesktop, NULL, hInstance, NULL);

此方法的问题在于，一切正常，我可以在屏幕上绘制任何图像或文本，直到在其他应用程序中不处于全屏状态为止.例如播放视频.

The problem is with this approach is that everything works fine, I can draw any images or texts on the screen until I am not in fullscreen in other application. For example playing videos.

经过大量搜索后，我发现了另一个解决问题的方法:

After searching a lot I have found an other solution for my problem:

2:Direct3D

我在msdn上找到了一个代码示例和一个很好的教程:

I found a code example and a good tutorial at msdn: http://msdn.microsoft.com/en-us/library/windows/desktop/dd797814(v=vs.85).aspx, but there is a problem(as always). It seems to me it uses a hardware overlay which is not supported in every graphics card. For example: ATI Radeon HD 6XXXX. But it is exactly what I need.

有人知道不需要硬件支持的适当解决方案吗?还是我做错了什么?

推荐答案

我解决了这个问题.我希望这会对某人有所帮助:

I solved the problem. I hope it will be helpful for someone:

因此，唯一的问题是在绘制完窗口后，我没有将窗口置于前景.您可以通过调用 SetWindowPos 来实现.虽然此解决方案无法在Windows 8 Metro平台上使用.

So the only problem was that i didnt bring the window to the foreground after I had drawn on it. You can do it by calling the SetWindowPos. Altough this solution isnt working on Windows 8 metro surface.

这篇关于Windows 7/8屏幕覆盖VC ++的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！