ImageGear for C and C++ on Windows v19.10 - Updated
IG_err_callback_get
API Reference Guide > Core Component API Reference > Core Component Functions Reference > Error Functions > IG_err_callback_get

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.

See Also

IG_err_callback_set