MaxScript Button

rollout choseOper "Choose Operator" width:171 height:220
(

 button btn1 "加选立方体" pos:[24,24]   width:109 height:23
 button btn2 "加选圆柱体" pos:[24,64]   width:109 height:23
 button btn3 "加选球体"   pos:[24,104]  width:109 height:23    
 button btn4 "取消选择"   pos:[24,144]  width:109 height:23
 
 on btn1 pressed do
  for a in geometry where classof a == box do selectmore a
 on btn2 pressed do
  for a in geometry  where classof a == cylinder do selectmore a
 on btn3 pressed do
  for a in geometry where classof a == sphere do selectmore a
 on btn4 pressed do
  deselect objects
)

createdialog choseOper