In win32 GUI programing with C++, How can I add a expanding button in the TreeViewCtrl before the root item?
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04-06-2021 - |
Question
In the C++ 、Win32、TreeCtrl, how can I add a expanding button before the root TVITEM, like add a expanding button before "United States". I'm sorry I can't post a image. So I try draw it blow.
TreeViewCtrl
| United States | | - Pennsylvania | | Altoona | | Harrisburg | | + Washington |
Solution
There are some MSDN pages on the different styles you may want to achieve: http://msdn.microsoft.com/en-us/library/bb760013.aspx and also this http://msdn.microsoft.com/en-us/library/b17bescz.aspx
MSDN states that
TVS_LINESATROOT
Uses lines to link items at the root of the tree-view control. This value is ignored if TVS_HASLINES is not also specified.
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