References ▼
This is a user callback interface that should be implemented and registered using SetUserEventsCallbackObject method of the ILMScrCap interface.
The filter will call this method every time a new mouse input event is posted.
Specifies the identifier of the mouse message. This parameter can be one of the following messages:
| Value | Meaning |
|---|---|
| USEREVENT_LBUTTONDOWN | The left mouse button is pressed. |
| USEREVENT_LBUTTONUP | The left mouse button is released. |
| USEREVENT_MOUSEMOVE | The mouse moves. |
| USEREVENT_MOUSEWHEEL | The mouse wheel is rotated. |
| USEREVENT_RBUTTONDOWN | The right mouse button is pressed. |
| USEREVENT_RBUTTONUP | The left mouse button is released. |
The X-coordinate of the mouse.
The Y-coordinate of the mouse.
Wheel delta where a positive value indicates that the wheel was rotated forward, away from the user; a negative value indicates that the wheel was rotated backward, toward the user. One wheel click is defined as WHEEL_DELTA, which is 120. This is valid only when the message is WM_MOUSEWHEEL.
Pointer to the user data.
The filter will call this method every time a new keyboard input event is posted.
Specifies the identifier of the keyboard message. This parameter can be one of the following messages:
| Value | Meaning |
|---|---|
| USEREVENT_KEYDOWN | The nonsystem key is pressed. |
| USEREVENT_ KEYUP | The nonsystem key is released. |
| USEREVENT_SYSKEYDOWN | The system key is pressed. |
| USEREVENT_SYSKEYUP | The system key is released. |
Specifies a virtual-key code.
Indicates if the ALT key is pressed or not.
Pointer to the user data.