GdPictureImaging.TwainOpenSource Method

Opens the source with the given name.

If another source is open, closes it and attempts to open the specified source.

First this function for each scanning process or to set the TWAIN state to 4 (TWAIN_SOURCE_OPEN) when the TWAIN state is 3 (TWAIN_SM_OPEN) or 2 (TWAIN_SM_LOADED) or 1 (TWAIN_PRESESSION).

public Boolean TwainOpenSource(
    IntPtr HANDLE, 
    String SourceName
);

Visual Basic

Public Function TwainOpenSource(
    ByVal HANDLE As IntPtr, 
    ByVal SourceName As String
) As Boolean

Parameters

Parameters	Description
HANDLE	A Window Handle IE: Me.Handle. In most applications you can use nothing but on Citrix and WTS, this must be a top-level window or a child of a top level window.
SourceName	The name of the source to open.

Returns

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

Remarks

If this returns TRUE, TWAIN is in STATE 4 (TWAIN_SOURCE_OPEN).