IAVIStream::ReadData

  • Article

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

HRESULT ReadData(
  PAVISTREAM ps,    
  DWORD fcc,        
  LPVOID lpBuffer,  
  LONG *lpcbBuffer  
);

Parameters

ps

Pointer to the interface to a stream.

fcc

Four-character code of the stream header to read.

lpBuffer

Pointer to the buffer to contain the header data.

lpcbBuffer

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 Values

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

**  Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
**  Windows 95/98/Me:** Included in Windows 95 and later.
**  Header:** Declared in Vfw.h.
**  Library:** Use Vfw32.lib.

See Also

Custom File and Stream Handlers, Custom File and Stream Handler Interfaces, AVIStreamReadData