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Engine sketch operation type options.
| Constant | Value | Description | 
|---|---|---|
| esriEngineSketchOperationGeneral | 0 | No specific type. | 
| esriEngineSketchOperationVertexAdded | 1 | An operation that added a vertex. | 
| esriEngineSketchOperationVertexDeleted | 2 | An operation that deleted a vertex. | 
| esriEngineSketchOperationVertexMoved | 3 | An operation that moved a vertex. |