IWDFIoRequestCompletionParams::GetIoctlParameters method (wudfddi.h)

[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]

The GetIoctlParameters method retrieves parameters that are associated with the completion of a device I/O control request.

Syntax

void GetIoctlParameters(
  ULONG      *pIoControlCode,
  IWDFMemory **ppInputMemory,
  SIZE_T     *pInputMemoryOffset,
  IWDFMemory **ppOutputMemory,
  SIZE_T     *pOutputMemoryOffset,
  SIZE_T     *pOutBytes
);

Parameters

pIoControlCode

[out, optional] A pointer to a variable that receives the control code that identifies the specific operation to be performed.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

ppInputMemory

[out, optional] A pointer to a variable that receives a pointer to the IWDFMemory interface for access to the input buffer for the completion of the device I/O control request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

pInputMemoryOffset

[out, optional] A pointer to a variable that receives the offset, in bytes, into the input buffer for the completion of the I/O control request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

ppOutputMemory

[out, optional] A pointer to a variable that receives a pointer to the IWDFMemory interface for access to the output buffer for the completion of the device I/O control request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

pOutputMemoryOffset

[out, optional] A pointer to a variable that receives the offset, in bytes, into the output buffer for the completion of the I/O control request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

pOutBytes

[out, optional] A pointer to a variable that receives the number of bytes that are output for the completion of the device I/O control request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

Return value

None

Requirements

   
End of support Unavailable in UMDF 2.0 and later.
Target Platform Desktop
Minimum UMDF version 1.5
Header wudfddi.h (include Wudfddi.h)
DLL WUDFx.dll

See also

IWDFIoRequestCompletionParams

IWDFMemory