C ++ WM

本文介绍了C ++ WM_NCCALCSIZE未发送的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

经过一些研究，我发现我必须处理WM_NCCALCSIZE消息，因此我试图将文本垂直放置在编辑控件中. 因此，我将编辑控件归为子类，但是WM_NCCALCSIZE消息从未发送.

I'm trying to center the text in a edit control vertically, after some research I found I have to process the WM_NCCALCSIZE message. So i've subclassed my edit control, but the WM_NCCALCSIZE message is never sent.

我做错什么了吗?

所以我正在很好地处理WM_NCCALCSIZE消息，并且我通过将WS_EX_CLIENTEDGE传递给CreateWindowEx创建了3d边框. 但是，如果我通过杀死主题服务禁用Windows主题，则处理WM_NCCALCSIZE消息的控件上的边框将消失. 另一个不处理WM_NCCALCSIZE消息的控件仍然具有正常的边框.

So i'm processing the WM_NCCALCSIZE message fine, and I have a 3d border created by passing WS_EX_CLIENTEDGE to CreateWindowEx. But if I disable windows themes by killing the theme service, the border goes away on the control thats processing the WM_NCCALCSIZE message. Another control that doesnt process the WM_NCCALCSIZE message still has the border like normal.

所以我假设我应该在WM_NCCALCSIZE中做些什么让我保持边界?如果是这样，该怎么办?如果没有任何办法找回边界?

So i'm assuming I'm supposed to be doing somethign in WM_NCCALCSIZE that allows me to keep the border? If so what? if not any way to get the border back?

推荐答案

弄清楚了，WM_NCCALCSIZE是在子类化编辑控件之前发送的. 所以我不得不超类EDIT类.

Figured it out, WM_NCCALCSIZE is sent before the edit control is subclassed. So i had to superclass the EDIT class.

我刚刚想到的另一种解决方案是将其子类化，然后用SWP_FRAMECHANGED调用SetWindowPos，这将导致其发送WM_NCCALCSIZE消息.

Another solution I just thought of would be to subclass it, then call SetWindowPos with SWP_FRAMECHANGED, this causes it to send the WM_NCCALCSIZE message.

如果有人对为什么一种方法优于另一种方法有任何意见，请发表评论:)

If anyone has any opinions why one method would be better then the other, please comment :)