Help Version 19.0.2017.10.27
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#include "lttwn.h"
L_LTTWN_API L_INT L_TwainCreateNumericContainerRange (pCapability, Type, uMinValue, uMaxValue, uStepSize, uDefaultValue, uCurrentValue)
TW_CAPABILITY * pCapability; |
pointer to a structure |
LTWAINNUMERICTYPE Type; |
container type |
L_UINT32 uMinValue; |
minimum range value |
L_UINT32 uMaxValue; |
maximum range value |
L_UINT32 uStepSize; |
step size of the range |
L_UINT32 uDefaultValue; |
range default value |
L_UINT32 uCurrentValue; |
range current value |
Allocates the hContainer member of the TW_CAPABILITY structure to be type TW_RANGE and fills it with the appropriate data.
Parameter |
Description |
pCapability |
Pointer to a structure that contains the capability container to allocate as type TW_RANGE. |
Type |
Type of data contained in the TW_RANGE container. For a list of possible values, refer to LTWAINNUMERICTYPE. |
uMinValue |
The minimum value of the range. |
uMaxValue |
The maximum value of the range. |
uStepSize |
The step size value of the range. |
uDefaultValue |
The default value of the range. |
uCurrentValue |
The current value of the range. |
SUCCESS |
The function was successful. |
! = SUCCESS |
An error occurred. Refer to Return Codes. |
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).
The step size is the amount of increase from one step to the next within the range uMinVal to uMaxVal. For example, if uMinValue = 0, uMaxValue = 100, and uStepSize = 2, then it will take 50 steps to increase from 0 to 100.
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. |
L_INT TwainCreateNumericContainerRangeExample(HTWAINSESSION g_hSession){L_INT nRet;TW_CAPABILITY twCap;memset (&twCap, 0, sizeof(TW_CAPABILITY));twCap.Cap = ICAP_XRESOLUTION;twCap.ConType = TWON_RANGE;nRet = L_TwainCreateNumericContainerRange(&twCap, TWAINNUMERICTYPE_TW_FIX32, 100, 600, 100, 200, 300);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;}