Returns or sets the background color of the entire control.
Image Thumbnail control
object.BackColor[=color]
Long
Use the RGB format. RGB (Red Green Blue) values range from 0 to 16,777,215 (&HFFFFFF). The high byte of a number in this range equals 0; the lower 3 bytes, from least to most significant byte, determine the amount of red, green, and blue, respectively. The red, green, and blue components are each represented by a number between 0 and 255 (&HFF).
The default value is light gray -- RGB (192, 192, 192).
The color specified should be different from the color set by the HighlightColor property to ensure the highlight remains visible against the background.
Do not confuse this property with the ThumbBackColor property, which sets the color of the background of the thumbnail boxes.
HighlightColor property
ThumbBackColor property