This function returns information about the associated private data pointer and update function using the dwCBID identifier.
Declaration:
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AT_ERRCOUNT ACCUAPI IG_mpi_CB_get(
[IN] HMIGEAR hMIGear,
[IN] DWORD dwCBID,
[OUT] LPVOID FAR* lplpPrivate,
[OUT] LPFNIG_MPCB_UPDATE FAR* lplpfnUpdate
);
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Arguments:
| hMIGear | The handle of the allocated multi-page image. |
| dwCBID | A unique identifier of the private data and function. |
| lplpPrivate | A pointer indicating where to receive the private data. |
| lplpfnUpdate | A pointer indicating where to receive the update function. See LPFNIG_MPCB_UPDATE. |
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 Professional.
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_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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Remarks:
See the IG_mpi_CB_set() documentation for a description of how notification works with multi-page images.
If there is no association with an external file, then NULL values are assigned to both pointers.