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Is there a way to figure out which control in my visualtree has focus? This is mostly for debugging.
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Focus is a low-level method intended primarily for custom control authors. Instead, application programmers should use the Select method or the ActiveControl property for child controls, or the Activate method for forms.
You can use this property to determine whether a control or any of the controls contained within it has the input focus. To determine whether the control has focus, regardless of whether any of its child controls have focus, use the Focused property.
Like this
bool FocusedElement = FocusManager.GetFocusedElement() == textBox;
Use FocusManager
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