B 系统变量

• BACKGROUNDPLOT
• BACKZ
• BACTIONCOLOR
• BDEPENDENCYHIGHLIGHT
• BEDITNAME
• BGRIPOBJECTCOLOR
• BGRIPOBJSIZE
• BIGFONTALT
• BINDTYPE
• BLIPMODE
• BLOCKEDITLOCK
• BLOCKEDITOR
• BLOCKLIBRARYSTATE
• BPARAMETERCOLOR
• BPARAMETERFONT
• BPARAMETERSIZE
• BSSTATE
• BTMARKDISPLAY
• BUILDVERSION
• BVMODE