How to reference checkbox on non-current tab of a tab control

[Technokrat]

How do you reference a checkbox on the non-current tab of a tab control?

I have 2 checkboxes on different tabs that are mutually exclusive. If the user checks checkbox 1 on Tab A, then a message is displayed, and checkbox 2 on Tab B should be automatically un-checked.

 

[Miros]

If I remember tab controls properly, you load a dialog and associate it with its tab.

Store the hWnd from each LoadDialog in a file local or static variable, then use GetDlgItem to check or uncheck your checkbox.

Or I could be completely off base.