IG_err_callback

This function obtains error stack callback data and functions that are called to signal error stack changes for the current thread.

Declaration:

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AT_ERRCODE ACCUAPI IG_err_callback_get( LPVOID FAR* lplpPrivate, LPFNIG_ERRSTACK_ADD FAR* lplpfnAddCB, LPFNIG_ERRSTACK_CLEAR FAR* lplpfnClearCB );

Arguments:

Name	Type	Description
lplpPrivate	LPVOID FAR*	Pointer to LPVOID variable to retrieve the private data that is passed to lplpfnAddCB and lplpfnClearCB callbacks. NULL is acceptable.
lplpfnAddCB	LPFNIG_ERRSTACK_ADD FAR*	Pointer to LPFNIG_ERRSTACK_ADD variable to retrieve the callback function that is called after the record is added to the error stack. NULL is acceptable.
lplpfnClearCB	LPFNIG_ERRSTACK_CLEAR FAR*	Pointer to LPFNIG_ERRSTACK_CLEAR variable to retrieve the callback function that is called after the error stack is cleared. NULL is acceptable.

Return Value:

Returns the code of the ImageGear error that occurred during this function call. A value of zero means no errors have occurred. Errors that occurred during this function call are not appended onto the error stack.

Supported Raster Image Formats:

This function does not process image pixels.

Sample:

Filters, Multimedia, Flashpix

Example:

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LPVOID lpPrivate; LPFNIG_ERRSTACK_ADD lpfnAdd; LPFNIG_ERRSTACK_CLEAR lpfnClear; AT_ERRCODE iErrCode; iErrCode = IG_err_callback_get(&lpPrivate, &lpfnAdd, &lpfnClear);

Remarks:

Callback data and functions can be set using the IG_err_callback_set function.

Each thread has its own independent error stack. There are two types of callbacks - local to thread and global. This API allows you to get the thread specific callbacks. Use IG_errmngr_callback_get to get the global data and callbacks.