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IOCTL_SD_BUS_DRIVER_GET_SLOT_COUNT (Compact 2013)

  • Article

3/26/2014

This I/O control message returns the number of slots detected in the secure digital (SD) bus controller. Send this message with DeviceIoControl.

Syntax

BOOL DeviceIoControl(
    HANDLE hDevice,           // handle to device
    DWORD dwIoControlCode,    // use IOCTL_SD_BUS_DRIVER_GET_SLOT_COUNT
    LPVOID lpInBuffer,        // pointer to input buffer
    DWORD nInBufferSize,      // input buffer size
    LPVOID lpOutBuffer,       // pointer to output buffer
    DWORD nOutBufferSize,     // output buffer size
    LPDWORD lpBytesReturned,  // number of bytes returned
    OVERLAPPED lpOverlapped   // pointer to OVERLAPPED structure
);

Parameters

  • hDevice
    The handle to the bus driver.
  • dwIoControlCode
    [in] Control code for the operation. Use IOCTL_SD_BUS_DRIVER_GET_SLOT_COUNT for this operation.
  • lpInBuffer
    [in] Not used; set to NULL.
  • nInBufferSize
    [in] Not used; set to zero.
  • lpOutBuffer
    [out] Pointer to a DWORD variable that contains the number of slots.
  • nOutBufferSize
    [in] Size of the value pointed to by lpOutBuffer.
  • lpBytesReturned
    [out] Pointer to a DWORD variable to return the length of returned data. If there is no error, set to sizeof(DWORD).
  • lpOverlapped
    Ignored.

Return Values

Returns TRUE if successful; otherwise, returns FALSE.

Remarks

To get extended error information, call GetLastError. GetLastError may return other standard error messages as appropriate.

Requirements

Header

sdcardddk.h

See Also

Reference

Secure Digital (SD) Card Driver IOCTLs