ulPageId (ULONG)
Page identifier with which to associate the tab color. Specify zero to change all the tabs to a specific color. This parameter is ignored if the BKV_AUTOCOLOR attribute has been specified for the ulPageId parameter.
rgbColor (ULONG)
Color that the tab should be set to. Additionally, the following value may be used:
BKV_AUTOCOLOR
rc (BOOL)
TRUE