擦除窗口背景 win32API
我的同学开始使用 Delphi 和 pascal，但我作为 c++ 程序员必须使用 win32 API。他们正在改变背景颜色，所以我也需要知道这一点，但有一些差异。
在delphi中，每个窗体看起来都有它自己的实例，为一个窗口设置背景颜色只是更改一个值的问题。 win32 的情况并非如此，当您更改该值时，它会影响使用该类的每个窗口（更新 ofc 后）。
我需要做的是清除/删除我的窗口背景。我可以使用 FillRect(..) 做到这一点，并且工作得非常好，但我还发现 WM_ERASEBKGND 这似乎正是我所需要的。他们提到，如果这条消息得到处理，我应该返回一个非零值，但他们没有告诉如何处理它。
那么，FillRect（和类似的）还有什么可以让我用我定义的画笔而不是类的默认值来擦除窗口吗？
谢谢
My classmates started using Delphi with pascal but I as c++ porgrammer have to use win32 API. They were changing background color so I need to know this aswell but there are some differencies.
In delphi each form looks like it has it's own instance, and setting background color for one window is just a matter of changing one value. Not the case with win32 where when you change that value it affects every window using that class (after update ofc).
What I need to do is to clear/erase my window background. I can do that with FillRect(..) and it's working very nicely, but I've found also WM_ERASEBKGND which seems to be doing exactly what I need. They mentioned that if this message gets proccessed I should return a non-zero, but they didn't tell how to process it.
So could anything else then FillRect(and similliar) let me erase a window with a brush I defined and not with the default for class?
Thanks
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您只需擦除背景即可处理
WM_ERASEBKGND（使用FillRect()就可以了）。通过返回非零值，您只是告诉 Windows 该消息已得到处理，无需采取进一步操作。没有什么比这更正式的了。
You process
WM_ERASEBKGNDsimply by erasing the background (usingFillRect()is fine).By returning a non-zero value, you are simply telling Windows that this message has been taken care of and no further action is needed. There is nothing more formal than that.
如果您将 MFC 与 C++ 一起使用，您还可以查看该框架的 CWnd::OnEraseBkgnd 实现
http://msdn.microsoft.com/en-我们/library/a0a52fkz(v=vs.80).aspx
If you're using MFC with C++ you can also check out that framework's implementation of CWnd::OnEraseBkgnd
http://msdn.microsoft.com/en-us/library/a0a52fkz(v=vs.80).aspx