This 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; fuModifiers = (UINT) LOWORD(lParam); uVirtKey = (UINT) HIWORD(lParam);
Hot key identifier that generated the message. If the message was generated by a system-defined hot key, the idHotKey parameter is one of the following values.
The snap desktop hot key was pressed.
The snap window hot key was pressed.
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.
Either ALT key was held down.
Either CTRL key was held down.
Both key up events and key down events generate a WM_HOTKEY message
Either SHIFT key was held down.
Either WINDOWS key was held down. These keys are labeled with the Microsoft Windows logo.
Specifies the virtual key code of the hot key.