IFileDocument.Read Method

Automation:

void Read ( [out] ref byte pData, [in] ulong off, [in] uint read_size) ;

Native (C++):

HRESULT Read ( [out] unsigned char * pData, [in] unsigned __int64 off, [in] unsigned long read_size) ;

Parameters

pDataA pointer to the buffer that receives the data read from a fileoffRead offsetread_sizeTotal number of bytes to read

Return Value

S_OK or standard OLE error code.

Remarks

Reads data from a document. If requested data exceeds the current document's size, any excess bytes are filled with zeros. Complexity: constant-time.

Examples

Reading Data

C++Copy Code

// pFileDocument is initialized elsewhere
unsigned char data[256];
pFileDocument->Read(data, 1000, 256);