//mMapCtrl - AxMapControl
string lResultPath = @"c:\temp"; //куда положить скриншот
FileInfo lInfo = new FileInfo(lResultPath);
lResultPath = Path.Combine(lInfo.Directory.ToString(), lInfo.Name + "_file" + lInfo.Extension);
IExporter lExporter = new JpegExporterClass();
short lResolution = (short)mMapCtrl.ActiveView.ScreenDisplay.DisplayTransformation.Resolution;
lExporter.Resolution = lResolution;
tagRECT myDeviceRECT = mMapCtrl.ActiveView.ScreenDisplay.DisplayTransformation.get_DeviceFrame();
EnvelopeClass myDriverBounds = new EnvelopeClass();
myDriverBounds.PutCoords(myDeviceRECT.left, myDeviceRECT.bottom, myDeviceRECT.right, myDeviceRECT.top);
lExporter.PixelBounds = myDriverBounds;
ITrackCancel myCancel = new CancelTrackerClass();
EnvelopeClass lEnvelopeClass = new EnvelopeClass();
IFeature lFeature = null;
mMapCtrl.ActiveView.Output(lExporter.StartExporting(), (int)lResolution, ref myDeviceRECT, mMapCtrl.Extent, myCancel);
lResultPath = Path.Combine(lInfo.Directory.ToString(), lInfo.Name + "_wolist" + aMapType.ToString() + lInfo.Extension);
lExporter.ExportFileName = lResultPath;
lExporter.FinishExporting();
//lResultPath - содержит имя временного файла, в который экспортирован скриншот