Handle the ZoomFactorChanged event and load the images corresponding to the new ZoomFactor value, or try using WMF images to render vector graphics.

Stoyan

The metafiles should work nice as vector graphics the first time you load them. I think the WMF images might be converted to bitmaps if you save a diagram and reload it back if there isn't a WMF image encoder provided with .NET.

FlowChart.NET does not encode or decode images by itself, it relies on the .NET GDI+ encoders and decoders. If FlowChart.NET cannot encode an image back to the original format of the image, it will default to PNG.

As a work-around you might reload the metafiles after loading a diagram. Or instead of setting the Box.Image property, set the ShapeTemplate.Image - that will avoid saving/loading the images altogether.

Stoyan