References ▼
#include "lttwn.h"
L_LTTWN_API L_BOOL L_IsTwainAvailable(hWnd)
Determines whether a TWAIN source is installed.
Handle to a window. (Internal TWAIN functions require a window handle; any valid window handle will work in this case.)
| Value | Meaning |
|---|---|
| TRUE | At least one TWAIN source is installed. |
| FALSE | No TWAIN source is installed. |
You can use this function when deciding whether to enable or disable TWAIN menu items.
Required DLLs and Libraries
L_INT IsTwainAvailableExample(HWND hWnd,HBITMAPLIST hBitmap){L_BOOL bAvailable;L_INT nRet;HTWAINSESSION hSession = NULL;APPLICATIONDATA AppData;/* Check to see if TWAIN is installed */bAvailable = L_IsTwainAvailable(hWnd);if (bAvailable){AppData.uStructSize = sizeof(APPLICATIONDATA);AppData.hWnd = hWnd;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 = L_TwainInitSession(&hSession, &AppData);if (nRet != SUCCESS)return nRet;nRet = L_TwainAcquireList(hSession, hBitmap, NULL, LTWAIN_SHOW_USER_INTERFACE);if(nRet != SUCCESS)return nRet;nRet = L_TwainEndSession(&hSession);if(nRet != SUCCESS)return nRet;}return SUCCESS;}