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IWDFMemory::CopyFromBuffer method (wudfddi.h)

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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 CopyFromBuffer method safely copies data from the specified source buffer to a memory object.

Syntax

HRESULT CopyFromBuffer(
  [in] ULONG_PTR DestOffset,
  [in] void      *SourceBuffer,
  [in] SIZE_T    NumOfBytesToCopyFrom
);

Parameters

[in] DestOffset

The offset, in bytes, into the memory object to start to copy data to.

[in] SourceBuffer

A pointer to the source buffer that data is copied from.

[in] NumOfBytesToCopyFrom

The number of bytes to copy from the SourceBuffer.

Return value

CopyFromBuffer 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