LTwain::GetSources

#include "ltwrappr.h"

virtual L_INT LTwain::GetSources (uFlags, uStructSize)

L_UINT uFlags;

optional flags

L_UINT uStructSize;

size of the LTWAINSOURCEINFO structure, in bytes

Gets the available information for the TWAIN sources installed on the system.

Parameter Description
uFlags Flags that indicate what sources to get.  Possible values are:
  Value Meaning
  LTWAIN_SOURCE_ENUMERATE_ALL [0x0000] Enumerates all the available sources.
  LTWAIN_SOURCE_ENUMERATE_DEFAULT [0x0001] Gets only the default source (currently selected).
uStructSize Size of the LTWAINSOURCEINFO structure, in bytes, for versioning. Use sizeof(LTWAINSOURCEINFO).

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Required DLLs and Libraries

LTTWN

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

See Also

Functions:

LTwain::SelectSource, LTwain::SourceInfoCallBack

Topics:

Managing the TWAIN Source

 

TWAIN Functionality: Property Functions.

Example

L_INT CMyTwain::SourceInfoCallBack(pLTWAINSOURCEINFO pSourceInfo) 
{ 
   L_TCHAR szBuffer[MAX_PATH]; 
   memset(szBuffer, 0, sizeof(szBuffer)); 
   wsprintf(szBuffer, TEXT("Source Name = %s\nProduct Family = %s\nManufacturer = %s\n"), 
   pSourceInfo->pszTwnSourceName, 
   pSourceInfo->pszTwnProductFamily, 
   pSourceInfo->pszTwnManufacturer); 
   MessageBox(NULL, szBuffer, TEXT("Source Info."), MB_OK); 
   return TWAIN_SUCCESS; 
} 
// initialize session and call this function 
L_INT LTwain__GetSourcesExample(CMyTwain *MyClass) 
{ 
   L_INT nRet; 
   MyClass->EnableCallBack (TRUE); 
   nRet = MyClass->GetSources(LTWAIN_SOURCE_ENUMERATE_ALL , sizeof(LTWAINSOURCEINFO)); 
   if (nRet != SUCCESS) 
   { 
      MessageBox (NULL, TEXT("Error during the enumeration procedure"), TEXT("ERROR"), MB_OK); 
      return nRet; 
   } 
   return SUCCESS; 
}

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