TchPdd_Ioctl (Compact 2013)

3/26/2014

This function provides various control options.

Syntax

DWORD WINAPI TchPdd_Ioctl(
  DWORD hPddContext,
  DWORD dwCode,
  PBYTE pBufIn,
  DWORD dwLenIn,
  PBYTE pBufOut,
  DWORD dwLenOut,
  PDWORD pdwActualOut
);

Parameters

• hPddContext
  [in] The PDD context handle that TchPdd_Init returns.

• dwCode
  [in] I/O control operation to perform.

• pBufIn
  [in] Pointer to the buffer that contains data to transfer to the device.

• dwLenIn
  [in] Number of bytes of data in the pBufIn buffer.

• pBufOut
  [out] Pointer to the buffer that receives data from the device.

• dwLenOut
  [in] Maximum number of bytes in the pBufOut buffer.

• pdwActualOut
  [out] Pointer to a DWORD that receives the count in bytes of data received into the pBufOut buffer. .

Return Value

TRUE indicates success. FALSE indicates failure.

Remarks

In the Compact 2013 implementation of the touch driver MDD, the MDD invokes TchPdd_Ioctl to handle these touch-specific I/O control operations:

• IOCTL_TOUCH_DISABLE_TOUCHPANEL
• IOCTL_TOUCH_ENABLE_TOUCHPANEL
• IOCTL_TOUCH_GET_CALIBRATION_POINTS
• IOCTL_TOUCH_GET_SAMPLE_RATE
• IOCTL_TOUCH_GET_TOUCH_PROPS
• IOCTL_TOUCH_SET_SAMPLE_RATE

The MDD invokes TchPdd_Ioctl to handle these power management I/O control operations:

• IOCTL_POWER_CAPABILITIES
• IOCTL_POWER_GET
• IOCTL_POWER_SET

The MDD handles these I/O control operations without calling TchPdd_Ioctl:

• IOCTL_TOUCH_SET_SAMPLE_TIMEOUT
• IOCTL_TOUCH_GET_SAMPLES

Requirements

See Also

Reference

Touch Driver DDSI Functions
Touch Driver IOCTLs