DTWAIN_IsFeederLoaded

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The DTWAIN_IsFeederLoaded function checks if there are documents loaded in the document feeder.

DTWAIN_BOOL DTWAIN_IsFeederLoaded ( DTWAIN_SOURCE Source );

Parameters

Source

Specifies an open TWAIN Source.

Return Values

If the automatic document feeder has been loaded with documents, TRUE is returned. Otherwise FALSE is returned.

Comments

The DTWAIN_IsFeederLoaded function takes the open Source Source, and checks to see if the document feeder has documents loaded. The document feeder must be enabled before calling this function (see DTWAIN_EnableFeeder). A return value of TRUE means that the document feeder does have documents loaded. A return value of FALSE will most likely mean one of the following scenarios occurred:

•	There are no documents in the feeder

•	The feeder has not been enabled (use DTWAIN_EnableFeeder to enable/disable the document feeder)

•	The device does not support querying whether the feeder is loaded. Some Sources have a document feeder, but there is no way to test if documents are loaded in the feeder.

•	The device does not have a document feeder.

Call DTWAIN_GetLastError if the return value is FALSE to determine the exact cause for failure. To test if the feeder can actually detect if documents are loaded, call DTWAIN_IsFeederSensitive.

TWAIN State Transitions

The source must be opened in State 4

Prerequisite Function Call(s)

DTWAIN_SysInitialize

DTWAIN Source Selection Function