L_TwainSetCapability

#include "lttwn.h"

L_LTTWN_API L_INT L_TwainSetCapability (hSession, pCapability, uFlags)

Sets the value of the specified capability.

Parameters

HTWAINSESSION hSession

Handle to an existing TWAIN session. This handle is obtained by calling the L_TwainInitSession or L_TwainInitSession2 function.

pTW_CAPABILITY pCapability

Pointer to the TW_CAPABILITY structure that references the capability value to set. This structure must be allocated and filled with data corresponding to the required capability before passing it to the function.

L_UINT uFlags

Flags that indicate whether to set or reset the capability value. Possible values are:

Value Meaning
LTWAIN_CAPABILITY_SET [1] Set the capability to the value specified in pCapability.
LTWAIN_CAPABILITY_RESET [2] Reset the value of the capability to the default value defined by the TWAIN source. In this case the pCapability can be NULL since it is not needed.

Returns

Value Meaning
SUCCESS The function was successful.
! = SUCCESS An error occurred. Refer to Return Codes.

Comments

To enable duplex scanning, set the CAP_DUPLEXENABLED option in the TW_CAPABILITY structure passed to this function.

This function must be called after L_TwainStartCapsNeg is called and before L_TwainEndCapsNeg is called.

Required DLLs and Libraries

Help Version 21.0.2021.4.7
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