ImageGear for C and C++ on Windows v19.1 - Updated
IG_mpi_CB_reset
API Reference Guide > Core Component API Reference > Core Component Functions Reference > Multi Page Image Functions > IG_mpi_CB_reset

This function removes previously associated callback data from the multi-page image using the dwCBID identifier.

Declaration:

 
Copy Code
AT_ERRCOUNT ACCUAPI IG_mpi_CB_reset( 
        [IN] HMIGEAR hMIGear, 
        [IN] DWORD dwCBID 
);

Arguments:

Name Type Description
hMIGear HMIGEAR Handle to allocated multi-page image.
dwCBID DWORD Unique identifier of private data and function.

Return Value:

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

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.

Sample:

None

Example:

 
Copy Code
HMIGEAR  hMIGear;      /* handle to multi-page image */
AT_ERRCOUNT nErrCount = IGE_SUCCESS; /* will hold returned error count  */
LPVOID lpData;
LPFNIG_MPCB_UPDATE    lpUpdateFunc;
DWORD dwCBID;
 ...
nErrCount = IG_mpi_CB_set( hMIGear, (LPVOID)hMIGear, _MPWndUpdate, &dwCBID );
 ...
nErrCount = IG_mpi_CB_reset( hMIGear, dwCBID );
 ...
}
VOID  ACCUAPI  _MPWndUpdate(
   DWORD          dwCBID,
   LPVOID         lpPrivate,     /* Private data passed in        */
   AT_MODE        nMode,
   UINT           nPage,
   UINT           nCount
)
{
   switch( nMode )
   {
   case  IG_MPCBMODE_MPI_DELETE:
         ...
      break;
   case  IG_MPCBMODE_MPI_ASSOCIATED:
         ...
      break;
   case  IG_MPCBMODE_MPI_CLOSE:
         ...
      break;
         ...
   }
}

Remarks:

See the IG_mpi_CB_set()documentation for a description of how notification works with multi-page images. After calling this function, the appropriate callback function receives notifications and removes the data from the active list.