Do you mean the size of the
tabs (ie tab page
header) or the tab page? I ask because by default the tab pages would typically fill the tab control.
If you mean the tabs (page header) then the two important properties to look at are the
ItemSize and the
SizeMode.
1. Calculate the required width = tabcontrol.width/number of tabs
2. Set SizeMode to Fixed
3. Set ItemSize = new ItemSize(width/current itemSize.Height)
Hope that helps.