For those that use EQ Windowed...
 

If you set your desktop and your EQ resolution the same, In windows XP (XP Theme); the following will place the EQWindow fullscreen widthwise, and show the Windows TaskBar under EQ (easier than alt tabbing from fullscreen or having EQ hide the menubar or accidentally moving the EQ Window):

EQClient.ini -

800x600:
[Defaults]
WindowedModeXOffset=-3
WindowedModeYOffset=-29
WindowedMode=TRUE
[VideoMode]
WindowedWidth=800
WindowedHeight=565

1024x768:
[Defaults]
WindowedModeXOffset=-3
WindowedModeYOffset=-29
WindowedMode=TRUE
[VideoMode]
WindowedWidth=1024
WindowedHeight=733

1280x1024:
[Defaults]
WindowedModeXOffset=-3
WindowedModeYOffset=-29
WindowedMode=TRUE
[VideoMode]
WindowedWidth=1280
WindowedHeight=989

1600x1024:
[Defaults]
WindowedModeXOffset=-3
WindowedModeYOffset=-29
WindowedMode=TRUE
[VideoMode]
WindowedWidth=1600
WindowedHeight=989