IAVIStream::ReadData method (vfw.h)

Article
02/22/2024

The ReadData method reads data headers of a stream. Called when an application uses the AVIStreamReadData function.

Syntax

HRESULT ReadData(
  DWORD  fcc,
  LPVOID lp,
  LONG   *lpcb
);

Parameters

fcc

Four-character code of the stream header to read.

lp

Pointer to the buffer to contain the header data.

lpcb

Size, in bytes, of the buffer specified by lpBuffer. When this method returns control to the application, the contents of this parameter specifies the amount of data read.

Return value

Returns the HRESULT defined by OLE.

Remarks

For handlers written in C++, ReadData has the following syntax:


HRESULT ReadData(DWORD fcc, LPVOID lp, LONG *lpcb);

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	vfw.h
Library	Vfw32.lib