I hope my combo box has 'Onclick' , How can I do?

I hope my combo box has 'Onclick' , How can I do?

  
I hope my combo box has 'Onclick' , How can I do?
I assume you're refering to an onchange handler? There is ons available for a combo box in which you can define a Destination, which can also be an action. 


But Onchange can not selute my problem. Like my IMG.
Erik-Jan Bulthuis wrote:
I assume you're refering to an onchange handler? There is ons available for a combo box in which you can define a Destination, which can also be an action. 
 But Onchange can not selute my problem. Like my IMG.
 
Then you need to set a onChange on the first combo box. 
Erik-Jan Bulthuis wrote:
Then you need to set a onChange on the first combo box. 
How ?
Can You tell me how to set a onChange on the first combo box. 
I worldn't  see that  the same operation in the difference Combo box. 

 
Solution
You'll have to add a action on the first combobox that adds a filter to the aggregate which populates the second combo box. The filter needs to say that the record that is equal to the value of the first combo box should be left out of the second combo box. You'll have to reload your form after repopulating the seconde combo box. 
Solution