L_IsTwainAvailable
#include "lttwn.h"
L_LTTWN_API L_BOOL L_IsTwainAvailable(hWnd)
L_HWND hWnd; |
/* handle to a window */ |
Determines whether a TWAIN source is installed.
Parameter |
Description |
hWnd |
Handle to a window. (Internal TWAIN functions require a window handle; any valid window handle will work in this case.) |
Returns
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
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
Example
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")); 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; }