IWiaItem::AnalyzeItem method (wia_xp.h)

The IWiaItem::AnalyzeItem method causes the Windows Image Acquisition (WIA) hardware device to acquire and try to detect what data types are present.

Syntax

HRESULT AnalyzeItem(
  [in] LONG lFlags
);

Parameters

[in] lFlags

Type: LONG

Currently unused. Should be set to zero.

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

This method is used with scanners to detect what type of data is on a page. When an application calls this method, the WIA hardware device driver scans and analyzes the current page. For each data type it detects, it creates an IWiaItem object to represent the region on the page the data occupies.

Image processing and OCR software can use this capability to detect graphics and text on a page. This method adds the regions it creates into the WIA device's IWiaItem tree. The application can select the individual regions and use the standard data transfer methods to acquire data from them.

If necessary, applications can override the regions created by this method.

Requirements