Add ProgressButton · ghost1372/DevWinUI@fa0bad2

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

'Microsoft.UI.Xaml.Controls.TitleBar' is for evaluation purposes only and is subject to change or removal in future updates.

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