Win32 IOCTL Calls

Use DeviceIoControl to call a driver from the Win32 environment.

BOOL
DeviceIoControl(
  HANDLE hDevice,
  DWORD dwIoControlCode,
  LPVOID lpInBuffer,
  DWORD nInBufferSize,
  LPVOID lpOutBuffer,
  DWORD nOutBufferSize,
  LPDWORD lpBytesReturned,
  LPOVERLAPPED lpOverlapped
);
 

Parameters

dwIoControlCode

Contains one of the control codes referred to in this document.

lpInBuffer

Contains either a minor I/O control code or data to be sent to a smart card.

nInBufferSize

The number of bytes to be sent to the card.

lpOutBuffer

Receives the result from the smart card.

nOutBufferSize

The size of the buffer.

lpBytesReturned

The number of bytes returned by this particular call.

Refer to the Platform SDK for more information and descriptions of the remaining parameters.