The WM_HOTKEY message is posted when the user presses a hot key registered by the RegisterHotKey function. The message is placed at the top of the message queue associated with the thread that registered the hot key.
WM_HOTKEY
idHotKey = (int) wParam; // identifier of hot key
fuModifiers = (UINT) LOWORD(lParam); // key-modifier flags
uVirtKey = (UINT) HIWORD(lParam); // virtual-key code
Parameters
idHotKey
Value of wParam. Specifies the identifier of the hot key that generated the message. If the message was generated by a system-defined hot key, the idHotKey parameter will be one of the following values:
| Value | Meaning |
| IDHOT_SNAPDESKTOP | The "snap desktop" hot key was pressed. |
| IDHOT_SNAPWINDOW | The "snap window" hot key was pressed. |
fuModifiers
Specifies the keys that were to be pressed in combination with the key specified by the nVirtKey parameter to generate the WM_HOTKEY message. The fuModifiers parameter can be a combination of the following values:
| Value | Meaning |
| MOD_ALT | Either ALT key was held down. |
| MOD_CONTROL | Either CTRL key was held down. |
| MOD_SHIFT | Either SHIFT key was held down. |
| MOD_WIN | Either WINDOWS key was held down. These keys appear only on the Microsoft Ergonomic Keyboard and are labeled with the Microsoft Windows logo. |
uVirtKey
Specifies the virtual key code of the hot key.
Remarks
WM_HOTKEY is unrelated to the WM_GETHOTKEY and WM_SETHOTKEY hot keys. The WM_HOTKEY message is sent for generic hot keys while the WM_SET\GETHOTKEY messages relate to window activation hot keys.
See Also