DTWAIN_SetContrastString

The DTWAIN_SetContrastString function sets the current Contrast value for the Source.

DTWAIN_BOOL DTWAIN_SetContrastString (

DTWAIN_SOURCE	Source,
LPCTSTR	Contrast );

Parameters

Source

An open TWAIN Source.

Contrast

The Contrast value to set the Source.

Return Values

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

Character specific versions

ANSI version:	DTWAIN_SetContrastStringA
Unicode version:	DTWAIN_SetContrastStringW

Comments

The DTWAIN_SetContrastString function works exactly the same way as DTWAIN_SetContrast, with the exception of the LPCTSTR parameter, which is a string that denote the value to use.

For example:

DTWAIN_SetContrastString( Source, "1000.0")

TWAIN State Transitions

The Source must be in State 4. or higher

Prerequisite Function Call(s)

DTWAIN_SysInitialize

DTWAIN Source Selection Function