GdPictureImaging.TwainSetCapCurrentNumeric Method

Changes the current value of a TWAIN capability from a numeric value.

The TwainGetAvailableCapValueNoNumeric() function should be used to determine what are the supported value which can be used with this function.

public Boolean TwainSetCapCurrentNumeric(
    TwainCapabilities Cap, 
    TwainItemTypes ItemType, 
    Double NewValue
);

Visual Basic

Public Function TwainSetCapCurrentNumeric(
    ByVal Cap As TwainCapabilities, 
    ByVal ItemType As TwainItemTypes, 
    ByVal NewValue As Double
) As Boolean

Parameters

Parameters	Description
Cap	A member of the TwainCapabilities enumeration.
ItemType	A member of the TwainItemTypes enumeration. You can determine the type of each TWAIN capability using the TwainGetCapItemType function or looking the twain references from http://www.twain.org
NewValue	New value (as numeric) to set to the selected TWAIN capability.

Returns

True if success, else False -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() functions for diagnosing the error.

Remarks

Before using this function check that the TWAIN state is >= 4 (TWAIN_SOURCE_OPEN)

To get the TWAIN state, use the TwainGetState() function.

Example

To set the X resolution to 100 DPI

Copy Code

              bSuccess = oGdPictureImaging.TwainSetCapCurrentNumeric(TwainCapabilities.ICAP_XRESOLUTION, oGdPictureImaging.TwainGetCapItemType(TwainCapabilities.ICAP_XRESOLUTION), 100)