Hi, there.

I set the MouseLeftButtonDown event or PreviewMouseLeftButtonDown event to textBoxW in the program, but it only responds to PreviewMouseLeftButtonDown. why?

Any assistance would be appreciated.

Cheers,

Jack

Thanks, Lyubo.

I did not set Handled to true in the Preview* event. For example:
private void textBoxH_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
isDragging = true;
clickPoint = e.GetPosition(this);
}

private void textBoxH_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
isDragging = true;
clickPoint = e.GetPosition(this);
}
The result will only respond to the Preview * event, I didn't handle both, I just want to know why this happens.

Best regards.

Thanks very much, Lyubo.

So that I have a deeper understanding of the routing events of the wpf control.

Best regards.