AccelerometerStart (Compact 2013)
3/26/2014
This function sends a start I/O control (IOCTL) to the driver.
Syntax
DWORD WINAPI AccelerometerStart(
HSENSOR hAccDevice,
HANDLE hMsgQueue
);
Parameters
- hAccDevice
[in] Handle of the opened accelerometer device previously returned by the AccelerometerOpen function.
- hMsgQueue
[in] Handle of the message queue to receive the accelerometer samples. This handle is returned from a call to CreateMsgQueue. The cbMaxMessage member of MSGQUEUEOPTIONS should be set tosizeof(ACC_DATA)
.
Return Value
The following table shows the possible return values.
Value |
Description |
---|---|
ERROR_SUCCESS |
Indicates success. |
ERROR_INVALID_PARAMETER |
Indicates that the handle of the accelerometer device and/or the handle of the message queue is invalid. |
Win32 error code |
Indicates all other errors. |
Remarks
After a call to this function, data samples are delivered to the user-supplied message queue. Queue messages conform to the ACC_DATA structure.
Only one message queue handle is allowed for an HSENSOR instance. Multiple calls to AccelerometerStart for a single HSENSOR instance return an error message.
Requirements
Header |
accapi.h |