Win32 API中的树视图控件 [英] Tree View Control in Win32 API

问题描述

我正在开发看起来像资源管理器的应用程序.

如果我第一次单击"+"(扩展标记)，TreeView_GetSelection()宏将不起作用.在随后的单击中，它工作正常.它返回零.如果单击树形视图控件中的文本显示，它将正常工作.

I am developing application that looks like explorer.

TreeView_GetSelection() macro is not working if I click "+" (Expansion mark) for the first time. In subsequent click it is working fine. It is returning zero. If I click on the text display in tree view control it is working fine.

推荐答案

返回值null不一定表示错误；根据 msdn [

A return value of null doesn''t necesarily mean an error; according to msdn[^], this message return null for the root item of the tree.

TreeView_GetSelection-NULL表示失败

TreeView_GetSelection - NULL indicates failure

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