L_VOID * pItem;

/* pointer to IWiaItem or IWiaItem2 interface */

L_TCHAR * pszID;

/* pointer to string array that represents the property ID as string */

L_UINT32 uID;

/* property ID */

L_UCHAR * pValue;

/* pointer to allocated buffer that contains the buffer to set */

L_SIZE_T uSize;

/* variable that contains the allocated buffer size */

Parameter

Description

pItem

Valid pointer to a type IWiaItem or IWiaItem2 object (IWiaItem if using WIA Version 1.0; IWiaItem2 if using WIA Version 2.0), which represents the item having the property.

You can retrieve this parameter by either calling the LWia::GetRootItem function to get a pointer to the device's root item or by enumerating the child items of the device through a call to LWia::EnumChildItems.

pszID

This string pointer should contain the equivalent property ID string for the WIA property ID (see example below):

Property ID

Property ID Equivalent String

WIA_IPA_TYMED

WIA_IPA_TYMED_STR or "Media Type"

WIA_IPA_DEPTH

WIA_IPA_DEPTH_STR or "Bits Per Pixel"

If this parameter is NULL then the WIA toolkit will use the ID passed through the uID parameter, otherwise the pszID parameter will be used whether or not you passed valid property ID through the uID parameter.

uID

The property ID of the property.

This parameter is required only if the pszID parameter is NULL, otherwise you can pass 0 for this parameter.

pValue

Pointer to the buffer to be set for the property provided through the Property ID parameter.

uSize

Variable that contains the allocated buffer size.

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

LTWIA

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Functions:

LWia::SetPropertyLong, LWia::SetPropertyString, LWia::SetPropertyGUID, LWia::SetPropertySystemTime, LWia::GetRootItem, LWia::EnumChildItems, LWia::InitSession, LWia::EndSession, Class Members

Topics:

Managing WIA Sources

WIA Functionality: Property Functions