What is the left mouse button callback in a PtImageArea ??

In Button widget, left mouse button callback is Activate,
but it’s no action in PtImageArea!!
Are there any thing must be added??

Just Check your Widget-Resources Callbacks, there will be inherited Callbacks like CB_BUTTON_PRESSED or similar, Moreover you can add your own Events, so if there is no Callback just add a Callback to start by click or release

I have found the answer!! The PtImageArea’s flag “Pt_SELECTABLE”
must be set, then the Activate callback can be action!! Thanks!!