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IWDFMemory::CopyToBuffer method (wudfddi.h)

  • Article
  • 02/22/2024

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 CopyToBuffer method safely copies data from a memory object to the specified target buffer.

Syntax

HRESULT CopyToBuffer(
  [in]  ULONG_PTR SourceOffset,
  [out] void      *TargetBuffer,
  [in]  SIZE_T    NumOfBytesToCopyTo
);

Parameters

[in] SourceOffset

The offset, in bytes, into the memory object from which to start copying data.

[out] TargetBuffer

A pointer to the target buffer to which data is copied.

[in] NumOfBytesToCopyTo

The number of bytes to copy to the TargetBuffer.

Return value

CopyToBuffer returns S_OK if the operation succeeds. Otherwise, this method returns one of the error codes that are defined in Winerror.h.

Requirements

Requirement Value
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