====== zmap_tile_MarkChanged ======

===== Description =====

Mark a tile in a mosaic map as being modified, so that when the tile is paged out of memory the changes are saved to disk rather than discarded. 

This function is required when the caller has directly modified the contents of a tile using [[zeolite:functions:zmap_tile_GetDataPtr]]. This function is not required if the map contents are changed using the [[zeolite:functions:zmap_SetPixel]] or [[zeolite:functions:zmap_tile_SetPixel]] functions, as these functions automatically mark the tile as being changed.

===== Files =====

^ Declaration | ''Zeolite.h'' |
^ Implementation | ''Zeolite.cpp'' |

===== Function prototype =====

<code="C++">
bool zmap_tile_MarkChanged(void* hTile);
</code>

===== Arguments =====

^  Name  ^  Type  ^ Comment ^
|  //hTile//  |  ''void*''  | A handle to a tile, as retrieved by the [[zeolite:functions:zmap_GetMosaicTile]] function. |

===== Return value =====

False if an error occurred, and true otherwise.

===== Comments =====

None.