产品版本
使用以下宏显示主题的版本和状态信息：
| 宏 | 扩展至 |
|---|---|
| \QtMajorVersion | 基于 $QT_VER 环境变量的主版本号 |
| \QtMinorVersion | 基于 $QT_VER 环境变量的次版本号 |
| \QtVersion | QT_VERSION 环境变量的值 |
| \QtVer | 环境变量 $QT_VER 的值 |
| \techpreview | 说明模块或类是初步版本，可能会更改 |
\techpreview
将技术预览链接附加到简要句中，并将主题添加到tech_preview 组。
必须直接置于
另请参阅 宏和宏。
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