IG_mpi_CB

IG_mpi_CB_reset

In This Topic

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

Declaration:

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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:

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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; ... } }

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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.

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