In WPF application I am currently trying to bind a Command to launch a calculator Tool form any where in the application using shortcut keys, I have created a command but not getting how to map commands and shortcut keys to create universal shortcut keys in my application. Thanks in advance.
You can do this in xaml - see the example in the documentation for the KeyBinding class:
<Window.InputBindings>
<KeyBinding Command="ApplicationCommands.Open"
Gesture="CTRL+R" />
</Window.InputBindings>
Update: Looks like you can't actually bind a KeyBinding to a ViewModel using just xaml if you're using MVVM: see here Keybinding a RelayCommand.