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Build docker image from multiple build contexts

Build docker image from multiple build contexts Building a docker image requires specifying a source of truth to include in the image from a local directory or a remote git repository. In the previous version, the docker BuildKit allows users to specify the build context from a single source of truth only. However, the engineers may need to have the context from different locations based on the type of files. For instance, icons, images or other resources that are not included in the same package, including the resource from other docker images. Fortunately, the Docker Buildx toolkit supports multiple build context flag for Docker 1.4. Let's learn how to use this new feature. The following list is a shortcut for jumping into a specific topic handy. What version of Docker is this tutorial targeting? How to specify the version of Dockerfile frontend? Ho
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[MFC]CListCtrl自動選擇一行 

m_List.SetItemState(nIndex, LVIS_SELECTED|LVIS_FOCUSED, LVIS_SELECTED|LVIS_FOCUSED);
m_List.EnsureVisible(nIndex, FALSE);

不過使用上面方式後的選擇顯示是灰色的標記，並不是用滑鼠點選時的藍色。

如果需要選擇成藍色則如下：
m_List.SetItemState(nIndex, LVIS_SELECTED|LVIS_FOCUSED, LVIS_SELECTED|LVIS_FOCUSED);
m_List.EnsureVisible(nIndex, FALSE);
m_List.SetFocus();

但是方法僅能用在按下按鈕的同時。

如有需要在另外的Thread中來做SetFocus()，則需使用SendMessage的方式來達成。
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