LTwain::IsAvailable

#include "ltwrappr.h"

virtual L_BOOL LTwain::IsAvailable()

Determines whether a TWAIN source is installed.

Returns

Value Meaning
TRUE At least one TWAIN source is installed.
FALSE No TWAIN source is installed.

Comments

You can use this function when deciding whether to enable or disable TWAIN menu items.

Required DLLs and Libraries

See Also

Functions

Topics

Example

L_INT LTwain__IsAvailableExample(HWND hWnd, HBITMAPLIST hBitmap) 
 
{ 
   L_BOOL            bAvailable; 
   L_INT             nRet; 
   LTwain            MyClass; 
   APPLICATIONDATA   AppData; 
 
   /* Check to see if TWAIN is installed */ 
 
   bAvailable = MyClass.IsAvailable(); 
 
   if (bAvailable) 
 
   { 
 
      AppData.hWnd = hWnd;  
 
      AppData.uStructSize = sizeof(APPLICATIONDATA); 
 
      lstrcpy (AppData.szManufacturerName, TEXT("LEAD Technologies, Inc."));  
      lstrcpy (AppData.szAppProductFamily, TEXT("LEAD Test Applications")); 
      lstrcpy (AppData.szVersionInfo, TEXT("Version 1.0")); 
      lstrcpy (AppData.szAppName, TEXT("TWAIN Test Application")); 
      AppData.uLanguage = TWLG_ENGLISH_USA; 
      AppData.uCountry = TWCY_USA; 
      nRet = MyClass.InitSession(&AppData);  
 
      if (nRet != SUCCESS)  
 
         return nRet; 
 
      nRet = MyClass.AcquireList(hBitmap, NULL, LTWAIN_SHOW_USER_INTERFACE); 
      if(nRet != SUCCESS) 
         return nRet; 
 
      nRet = MyClass.EndSession(); 
      if(nRet != SUCCESS) 
         return nRet; 
 
   } 
 
   return SUCCESS; 
} 
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