DTWAIN_SetTwainMode

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The DTWAIN_SetTwainMode function sets the method in which DTWAIN will communicate with the TWAIN system during acquisitions.

•	DTWAIN_BOOL DTWAIN_SetTwainMode ( LONG TwainMode );

Parameters

TwainMode

Value identifying the TWAIN mode to use when communicating with a Source during acquisition of an image.

Return Values

The return value is TRUE if successful. Otherwise FALSE is returned.

Comments

The DTWAIN_SetTwainMode function sets the method in which DTWAIN will communicate with TWAIN whenever an acquisition occurs, or when DTWAIN_ShowUIOnly is called. Acquisitions occur during TWAIN States 6 and 7. The values for TwainMode must be only one of the following:

Twain Mode	Value	Definition
DTWAIN_MODAL	1	Acquire using modal acquisition processing
DTWAIN_MODELESS	2	Acquire using modeless acquisition processing.

Briefly, the DTWAIN_MODAL processing is to be used by applications written in languages that cannot or do not want to adjust the application's message loop to accommodate TWAIN message handling. The DTWAIN_MODELESS processing is to be used by application's written in a language that can (and do) adjust the application message loop. Usually this includes C or C++ applications.

By default, DTWAIN is initialized for DTWAIN_MODAL processing.

Modeless and Modal acquisition processing is defined in detail in the topic Introduction to DTWAIN Acquisition Processing.

TWAIN State Transitions

None.

Prerequisite Function Call(s)

DTWAIN_SysInitialize