Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#include "lttwn.h"
L_LTTWN_API L_INT L_TwainCreateNumericContainerEnum (pCapability, Type, uNumOfItems, uCurrentIndex, uDefaultIndex, pData)
TW_CAPABILITY * pCapability; |
/* pointer to a structure */ |
LTWAINNUMERICTYPE Type; |
/* container type */ |
L_UINT32 uNumOfItems; |
/* number of enumeration items */ |
L_UINT32 uCurrentIndex; |
/* current index */ |
L_UINT32 uDefaultIndex; |
/* default index */ |
L_VOID * pData; |
/* pointer to an allocated array */ |
Allocates the hContainer member of the TW_CAPABILITY structure to be type TW_ENUMERATION and fills it with the appropriate data.
Parameter |
Description |
pCapability |
Pointer to a structure that contains the capability container to allocate as type TW_ENUMERATION. |
Type |
Type of data contained in the TW_ENUMERATION container. For a list of possible values, refer to LTWAINNUMERICTYPE. |
uNumOfItems |
Number of items in the enumeration. |
uCurrentIndex |
Index of the current value in the enumeration data. |
uDefaultIndex |
Index of the default value in the enumeration data. |
pData |
Pointer to an allocated array of type TW_ENUMERATION that has been initialized with the appropriate data and size information. |
Returns
SUCCESS |
The function was successful. |
! = SUCCESS |
An error occurred. Refer to Return Codes. |
Comments
When enumerating and getting capabilities, the toolkit takes care of creating the necessary TW_CAPABILITY containers. However, if the user wants to set a capability using the L_TwainSetCapability function, he or she must declare a TW_CAPABILITY container of the appropriate type (TW_ARRAY, TW_ENUMERATION, TW_RANGE, or TW_ONEVALUE).
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
static HTWAINSESSION g_hSession; L_INT TwainCreateNumericContainerEnumExample(L_VOID) { L_INT nRet; TW_CAPABILITY twCap; L_UINT16 uItem[3]; memset (&twCap, 0, sizeof(TW_CAPABILITY)); twCap.Cap = ICAP_XFERMECH; twCap.ConType = TWON_ENUMERATION; uItem[0] = TWSX_FILE; uItem[1] = TWSX_MEMORY; uItem[2] = TWSX_NATIVE; nRet = L_TwainCreateNumericContainerEnum(&twCap, TWAINNUMERICTYPE_TW_UINT32, 3, TWSX_MEMORY, TWSX_NATIVE, (L_INT *)uItem); if(nRet != SUCCESS) return nRet; nRet = L_TwainStartCapsNeg(g_hSession); if(nRet != SUCCESS) return nRet; nRet = L_TwainSetCapability(g_hSession, &twCap, LTWAIN_CAPABILITY_SET); if(nRet != SUCCESS) return nRet; nRet = L_TwainFreeContainer(&twCap); if(nRet != SUCCESS) return nRet; nRet = L_TwainEndCapsNeg(g_hSession); if(nRet != SUCCESS) return nRet; return SUCCESS; }