DTWAIN_GetCapOperations

The DTWAIN_GetCapOperations function gets the operations (GET, GETDEFAULT, SET, etc.) that are supported by a capability.

DTWAIN_BOOL DTWAIN_GetCapOperations (

DTWAIN_SOURCE	Source,
LONG	Capability,
LPLONG	lpOperations );

Parameters

Source

An open TWAIN Source.

Capability

The capability that is to be queried for the operations.

lpOperations

Address of a LONG that will retrieve the operations supported.

Return Values

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

Comments

The DTWAIN_GetCapOperations function gets a Source's device capability available operations for a capability Capability. The operations are returned in the address lpOperations. One or more of the following values Boolean ORed will define the returned operations together:

Capability Operation	Definition
DTWAIN_CO_GET	Cap supports DTWAIN_CAPGET
DTWAIN_CO_GETCURRENT	Cap supports DTWAIN_CAPGETCURRENT
DTWAIN_CO_GETDEFAULT	Cap supports DTWAIN_CAPGETDEFAULT
DTWAIN_CO_SET	Cap supports DTWAIN_CAPSET
DTWAIN_CO_SETCONSTRAINT	Cap supports DTWAIN_CAPSETCONSTRAINT
DTWAIN_CO_RESET	Cap supports DTWAIN_CAPRESET
DTWAIN_CO_CONSTRAINABLE	Cap can constrain values
DTWAIN_CO_GETHELP	Cap has available help text
DTWAIN_CO_GETLABEL	Cap has available label text
DTWAIN_CO_GETLABELENUM	Cap has multiple label text

TWAIN State Transitions

The Source must be in State 4 or higher (depending on the capability).

Prerequisite Function Call(s)

DTWAIN_SysInitialize

DTWAIN Source Selection Function