DTWAIN_SetContrastString

DTWAIN_SetContrastStringA

DTWAIN_SetContrastStringW

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

TRUE if successful, FALSE otherwise. If the function returns FALSE, call DTWAIN_GetLastError() to get extended information.

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