Message

Description

VPEND_DISABLE

Calls cVpenD_API_Disable to disable the tablet.

VPEND_ENABLE

Calls cVpenD_API_Enable to enable the tablet.

VPEND_FREE

Frees all resources used to monitor the pen device and decrements the number of installed drivers.

VPEND_GETCALIBRATION

Determines hardware calibration information and puts it into a DRV_CALBSTRUCT structure provided by the caller.

VPEND_GETPENINFO

For a pen driver that supports more than one virtual machine (VM), copies the pen information for the current VM to a DRV_PENINFO structure provided by the caller. The sample pen driver does not use a VPEND_GETPENINFO message.

VPEND_LOAD

Initializes variables so the tablet can later be enabled.

VPEND_OEM

An OEM-specific message which is passed through to the OEM-provided part of the virtual pen driver.

VPEND_PENPLAYBACK

Starts playing back an array of stored pen packets, substituting the stored pen packets for pen packets assembled from tablet interrupt information.

VPEND_PENPLAYSTART

Puts the virtual pen driver in playback mode by setting up all data structures necessary to act on the next VPEND_PENPLAYBACK message received.

VPEND_PENPLAYSTOP

Takes the virtual pen driver out of playback mode.

VPEND_SETCALIBRATION

Sets calibration values in the hardware information structure.

VPEND_SETSAMPLINGDIST

Sets the sampling distance. The sample virtual pen driver sets the new sampling distance value in the DRV_PENINFO structure but does not call an OEM-supplied code to set the sampling rate.

VPEND_SETSAMPLINGRATE

Calls OEM-supplied, device-specific code to set the tablet sampling rate.