 Backpage Orientation 
BKS_BACKPAGESBR         0x00000001        Bottom right
BKS_BACKPAGESBL         0x00000002        Bottom left
BKS_BACKPAGESTR         0x00000004        Top right
BKS_BACKPAGESTL         0x00000008        Top left

 Major Tab Side 
BKS_MAJORTABRIGHT       0x00000010        Major tabs right
BKS_MAJORTABLEFT        0x00000020        Major tabs left
BKS_MAJORTABTOP         0x00000040        Major tabs top
BKS_MAJORTABBOTTOM      0x00000080        Major tabs bottom

 Tab Type 
BKS_SQUARETABS          0x00000000        Square edged tabs
BKS_ROUNDEDTABS         0x00000100        Round edged tabs
BKS_BUTTONAREA          0x00000200        WPS button area

 Binding type 
BKS_SOLIDBIND           0x00000000        Solid binding
BKS_SPIRALBIND          0x00000400        Spiral binding
BKS_TABBEDDIALOG        0x00000800        Warp 4 dialog
