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IOCTL_BATTERY_SET_INFORMATION

IOCTL_BATTERY_SET_INFORMATION control code

Sets various battery information. The input parameter structure, BATTERY_SET_INFORMATION, indicates which battery status information is to be set.

To perform this operation, call the DeviceIoControl function with the following parameters.



BOOL DeviceIoControl(
  (HANDLE) hDevice,              // handle to battery
  IOCTL_BATTERY_SET_INFORMATION, // dwIoControlCode
  (LPVOID) lpInBuffer,           // input buffer
  (DWORD) nInBufferSize,         // size of input buffer
  NULL,                          // lpOutBuffer
  0,                             // nOutBufferSize
  (LPDWORD) lpBytesReturned,     // number of bytes returned
  (LPOVERLAPPED) lpOverlapped    // OVERLAPPED structure
);

Parameters

hDevice

A handle to the battery on which the information is to be set. To retrieve a device handle, call the CreateFile function.

dwIoControlCode

The control code for the operation. This value identifies the specific operation to be performed and the type of device on which to perform it. Use IOCTL_BATTERY_SET_INFORMATION for this operation.

lpInBuffer

A pointer to a BATTERY_SET_INFORMATION structure.

nInBufferSize

The size of the input buffer, in bytes.

lpOutBuffer

Not used with this operation; set to NULL.

nOutBufferSize

Not used with this operation; set to zero.

lpBytesReturned

A pointer to a variable that receives the size of data returned in the lpOutBuffer buffer, in bytes.

If the output buffer is too small to return any data, then the call fails, GetLastError returns the error code ERROR_INSUFFICIENT_BUFFER, and the returned byte count is zero.

If lpOverlapped is NULL (nonoverlapped I/O), lpBytesReturned cannot be NULL, even if lpOutBuffer is NULL.

If lpOverlapped is not NULL (overlapped I/O), lpBytesReturned can be NULL. If this is an overlapped operation, you can retrieve the number of bytes returned by calling the GetOverlappedResult function. If hDevice is associated with an I/O completion port, you can get the number of bytes returned by calling the GetQueuedCompletionStatus function.

lpOverlapped

A pointer to an OVERLAPPED structure.

If hDevice was opened with the FILE_FLAG_OVERLAPPED flag, lpOverlapped must point to a valid OVERLAPPED structure. In this case, DeviceIoControl is performed as an overlapped (asynchronous) operation. If the device was opened with the FILE_FLAG_OVERLAPPED flag and lpOverlapped is NULL, the function fails in unpredictable ways.

If hDevice was opened without specifying the FILE_FLAG_OVERLAPPED flag, lpOverlapped is ignored and the DeviceIoControl function does not return until the operation has been completed, or until an error occurs.

Return value

If the operation completes successfully, DeviceIoControl returns a nonzero value.

If the operation fails or is pending, DeviceIoControl returns zero. To get extended error information, call GetLastError.

Remarks

All requests to set battery information will complete with the status of ERROR_FILE_NOT_FOUND if the battery tag of the request does not match that of the current battery tag.

For the implications of overlapped I/O on this operation, see the Remarks section of the DeviceIoControl topic.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Poclass.h;
Batclass.h on Windows Server 2008 R2, Windows 7, Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP

See also

Battery Information
Power Management Control Codes
DeviceIoControl
BATTERY_SET_INFORMATION
IOCTL_BATTERY_QUERY_INFORMATION
IOCTL_BATTERY_QUERY_STATUS
IOCTL_BATTERY_QUERY_TAG

 

 

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