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帮助里面是这样写的: 
Use the following function to change the default user input controls:  
void setUserInputControls(AcEdJig::UserInputControls uic); 
The user input controls put limitations on the drag sequence or the type of acceptable return value (for example, by not allowing negative responses, by not allowing a zero response, or by restricting the input value to a 2D coordinate). They also specify how various user actions affect the drag sequence. For example, kAcceptMouseUpAsPoint specifies that releasing the mouse button indicates the input value主要想问:For example, kAcceptMouseUpAsPoint specifies that releasing the mouse button indicates the input value 
这个是通过什么实现的?有通过系统变量吗?其他如Lisp或VBA能否实现? |   
 
 
 
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