0x1600 OFFSET
0x0001 BCM_GETIDEALSIZE
0x0003 BCM_GETIMAGELIST
0x000A BCM_GETNOTE
0x000B BCM_GETNOTELENGTH
0x0008 BCM_GETSPLITINFO
0x0005 BCM_GETTEXTMARGIN
0x0006 BCM_SETDROPDOWNSTATE
0x0002 BCM_SETIMAGELIST
0x0009 BCM_SETNOTE
0x000C BCM_SETSHIELD
0x0007 BCM_SETSPLITINFO
0x0004 BCM_SETTEXTMARGIN
