The other messages the pen driver can receive are summarized in the following table. The pen driver should, at a minimum, respond to each of these messages by returning the code DRV_SUCCESS or DRV_FAILURE.
Message | Description |
DRV_EXITSESSION | The sample pen driver ignores this message. |
DRV_EXITAPPLICATION | The sample pen driver ignores this message. |
DRV_GetCalibration | Instructs the pen driver to fill a calibration structure with the current calibration settings. |
DRV_GetName | Returns the name of the pen driver. |
DRV_GetPenSamplingRate | Returns the current sampling rate. |
DRV_GetPenInfo | Fills a specified DRV_PENINFO structure with the current pen information. |
DRV_GetVersion | Returns the driver version and the pen packet size. |
DRV_PenPlayBack | Performs the playback of a specified number of pen packets from an array of pen packets. |
DRV_PenPlayStart | Tells the pen driver the format of the pen packet data it will receive with the DRV_PenPlayBack message. |
DRV_PenPlayStop | Forces the pen driver out of playback mode. |
DRV_POWER | The sample pen driver ignores this message. |
DRV_Query | Returns whether or not the pen driver supports the specified message. |
DRV_RemoveEntryPoints | Removes an interrupt processing routine that was registered with a DRV_SetEntryPoints message. |
DRV_SetEntryPoints | Registers a device or DLL to receive pen information (pen packets or any other OEM-specific information) at interrupt time. |
DRV_SetPenSamplingRate | Instructs the pen hardware or software to report a specified number of points per second. |
DRV_SetPenSamplingDist | Instructs the pen driver to filter out pen packets that have not moved a specified number of tablet units from the last reported locations. |
DRV_SetCalibration | Instructs the pen drivers to calibrate the pen input to new tablet dimensions. |
An OEM can define a list of custom messages. Custom messages must have defined values between DRV_RESERVED and DRV_USER, as set in the WINDOWS.H file.