| Prefix | Message category | Documentation |
|---|
| ABM and ABN | Application desktop toolbar | Shell Messages and Notifications |
| ACM and ACN | Animation control | Animation Control Messages and Animation Control Notifications |
| BCM, BCN, BM, and BN | Button control | Button Control Messages and Button Control Notifications |
| CB and CBN | ComboBox control | ComboBox Control Messages and ComboBox Control Notifications |
| CBEM and CBEN | ComboBoxEx control | ComboBoxEx Messages and ComboBoxEx Notifications |
| CCM | General control | Control Messages |
| CDM | Common dialog box | Common Dialog Box Messages |
| DFM | Default context menu | Shell Messages and Notifications |
| DL | Drag list box | Drag List Box Notifications |
| DM | Default push button control | Dialog Box Messages |
| DTM and DTN | Date and time picker control | Date and Time Picker Messages and Date and Time Picker Notifications |
| EM and EN | Edit control | Edit Control Messages, Edit Control Notifications, Rich Edit Messages, and Rich Edit Notifications |
| HDM and HDN | Header control | Header Control Messages and Header Control Notifications |
| HKM | Hot key control | Hot Key Control Messages |
| IPM and IPN | IP address control | IP Address Messages and IP Address Notifications |
| LB and LBN | List box control | List Box Messages and List Box Notifications |
| LM | SysLink control | SysLink Control Messages |
| LVM and LVN | List view control | List View Messages and List View Notifications |
| MCM and MCN | Month calendar control | Month Calendar Messages and Month Calendar Notifications |
| PBM | Progress bar | Progress Bar Messages |
| PGM and PGN | Pager control | Pager Control Messages and Pager Control Notifications |
| PSM and PSN | Property sheet | Property Sheet Messages and Property Sheet Notifications |
| RB and RBN | Rebar control | Rebar Control Messages and Rebar Control Notifications |
| SB and SBN | Status bar window | Status Bar Messages and Status Bar Notifications |
| SBM | Scroll bar control | Scroll Bar Messages |
| SMC | Shell menu | Shell Messages and Notifications |
| STM and STN | Static control | Static Control Messages and Static Control Notifications |
| TB and TBN | Toolbar | Toolbar Control Messages and Toolbar Control Notifications |
| TBM and TRBN | Trackbar control | Trackbar Control Messages and Trackbar Control Notifications |
| TCM and TCN | Tab control | Tab Control Messages and Tab Control Notifications |
| TDM and TDN | Task dialog | Task Dialog Messages and Task Dialog Notifications |
| TTM and TTN | Tooltip control | Tooltip Control Messages and Tooltip Control Notifications |
| TVM and TVN | Tree-view control | Tree View Messages and Tree View Notifications |
| UDM and UDN | Up-down control | Up-Down Messages and Up-Down Notifications |
| WM | General | - Clipboard Messages
- Clipboard Notifications
- Common Dialog Box Notifications
- Cursor Notifications
- Data Copy Message
- Desktop Window Manager Messages
- Device Management Messages
- Dialog Box Notifications
- Dynamic Data Exchange Messages
- Dynamic Data Exchange Notifications
- Hook Notifications
- Keyboard Accelerator Messages
- Keyboard Accelerator Notifications
- Keyboard Input Messages
- Keyboard Input Notifications
- Menu Notifications
- Mouse Input Notifications
- Multiple Document Interface Messages
- Raw Input Notifications
- Scroll Bar Notifications
- Timer Notifications
- Window Messages
- Window Notifications
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