ImageViewerControl is it possible to add PTZ buttons or panel with transparent background on this control - using Windows Forms. - I can only get it to show the full color, not transparent.Regards

This is possible and it is shown by the VideoViewerQuality sample, please see this –

https://doc.developer.milestonesys.com/html/index.html?base=samples/videoviewerquality_sample.html&tree=tree_2.html

I see that I can add shapes, but not that I can add a panel or usercontrol with buttons this transparent background, or am I missing something.

In a Smart Client plugin you have VideoOS.Platform.Client.ImageViewerAddOn.ActiveElementsOverlayAdd

This samples shows its usage: https://doc.developer.milestonesys.com/html/index.html?base=samples/activeelementsoverlay_sample.html&tree=tree_1.html

In the standalone scenario using ImageViewerWfpControl or ImageViewerControl you do not have this and will have to resort to using VideoOS.Platform.Client.ImageViewerWpfControl.ShapesOverlayAdd

There are elements you can use in the Smart Client environment but not in standalone. I guess you can do transparent shapes but perhaps not more advanced elements.