This VB example sets the background color of the control to light gray:
ActiveDcam1.BackColor = RGB (192, 192, 192)
When the control displays a live video, its background is only visible if the size of the video display in the horizontal or vertical dimension is less than the size of the control window.
BackColor is an ambient property, therefore its default value is defined by the color of the form on which the control resides. Changing the background color of the container application will cause an equivalent change in the BackColor property of ActiveDcam.