This is happens because of DOSBox. DOSBox is emulating tool which run 16-bit application on 32/64-bit OS. DOSBox specially design for gaming and only for keyboard interactions.

We used it run Turbo Pascal on 32/64-bit OS. So, you need to use Turbo Pascal Keyboard shortcuts. For menu you can use Alt+First later of menu item name.

• For Example

1. For Run Menu → alt+r
2. For Compile Menu → alt+c

When menu is open you can use top-down arrow and enter key to select an option. You can find the list of all shortcuts of Turbo Pascal and DOSBox here.