| Editor | |
| FBDialog | |
| FileViewDialog | |
| FindDialog | |
| FncDialog | |
| HelpWidget | |
| Highlighter_Dec | |
| Highlighter_Ins | |
| Highlighter_Dec::HighlightingRule | |
| Highlighter_Ins::HighlightingRule | |
| ImportExport | |
| MainWindow | |
| PageCtrl | |
| PageData | |
| PathExtDialog | |
| PathFileNameDialog | |
| POUInfoDialog | |
| PrefDialog | |
| PrintPrepare | |
| Prototype | |
| QtLocalPeer | |
| QtLP_Private::QtLockedFile | Extends QFile with advisory locking functions |
| QtLockedFile | Extends QFile with advisory locking functions |
| QtSingleApplication | API to detect and communicate with running instances of an application |
| SessionManager | |
| TabWidget |
1.5.9