IG_TWAIN_CB_register

This function registers one of the seven available scan callback functions.

Declaration:

	Copy Code
AT_ERRCOUNT ACCUAPI IG_TWAIN_CB_register( LPVOID lpfnTwainCB, AT_MODE nCBType, LPVOID lpData );

Name	Type	Description
lpfnTwainCB	LPVOID	A FAR pointer to the scan callback function you would like to register.
nCBType	AT_MODE	Set to the type of callback being registered. Use one of the following ImageGear-defined constants: IG_TW_CBT_BEFORE_PAGE IG_TW_CBT_AFTER_TRANSFORM_PAGE IG_TW_CBT_BEFORE_DOC IG_TW_CBT_AFTER_DOC IG_TW_CBT_CAP_SET_5 IG_TW_CBT_DEVICE_EVENT
lpData	LPVOID	Optional pointer from which to pass and receive data. Set to NULL if you don't need to do this.

Name

Type

Description

lpfnTwainCB

LPVOID

A FAR pointer to the scan callback function you would like to register.

nCBType

Set to the type of callback being registered. Use one of the following ImageGear-defined constants:

lpData

LPVOID

Optional pointer from which to pass and receive data. Set to NULL if you don't need to do this.

Returns the number of ImageGear errors that occurred during this function call. If there are no errors, the return value is IGE_SUCCESS.

This function does not process image pixels.