How can I check a checkbox with triggers?

[HerlySQR]

Hello, I wanna set a checkbox created with the QuestCheckBox template to checked using triggers, but I couldn't, I tried using BlzFrameClick with it and its children, but didn't work, how can I do that?

 

[Tasyen]

One can't, as far I know. Best one can do is, show the child-Frame which shows the checked Texture.