IG_mpi_CB

Use this function to call code that associates the given multi-page image hMIGear with any lpPrivate data, and updates the defined function.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_mpi_CB_set( [IN] HMIGEAR hMIGear, [IN] LPVOID lpPrivate, [IN] LPFNIG_MPCB_UPDATE lpfnUpdate, [OUT] LPDWORD lpdwCBID, );

Arguments:

Name	Type	Description
hMIGear	HMIGEAR	The handle to the allocated multi-page image.
lpPrivate	LPVOID	Any private data.
lpfnUpdate	LPFNIG_MPCB_UPDATE	The pointer to the update function.
lpdwCBID	LPDWORD	Indicates where to return the ID of the associated callback data.

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++.

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_get( hMIGear, dwCBID, &lpData, &lpUpdateFunc ); ... } 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_get( hMIGear, dwCBID, &lpData, &lpUpdateFunc );
 ...
}
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:

Multi-page images allow you to notify the application about status changes. Use this function to call code that associates the given multi-page image hMIGear with any lpPrivate data, and updates the defined function. See LPFNIG_MPCB_UPDATE.