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I have two keyboards attached to a PC. One is used to type in TMemo1 and the other in TMemo2. Both are allowed to type at the same time. The problem is I cannot distinguish what keyboard-one has typed and what keyboard-two has typed.

Is there any way to distinguish, which device certain input came from?

IInspectable
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Dian
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2 Answers2

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@Dian, you can use the RegisterRawInputDevices function to register the keyboards and monitor the WM_INPUT message to determine the device (keyboard) where the input came from.

check theses links for more info

RRUZ
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As far as I know there is no way to distinguish keyboards unil you have hooked keyboard driver. Windows provide solid input model to application, so there is no difference for application receiving input from keyboard, second keyboard, IR remote control, or from another program that uses SendInput API function.

STO
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  • This is wrong. [Raw Input](https://msdn.microsoft.com/en-us/library/windows/desktop/ms645536.aspx) allows you to discern input from different input devices. Using a low-level keyboard hook you can also distinguish between genuine input and input from a call to `SendInput`. The *flags* field of the [KBDLLHOOKSTRUCT](https://msdn.microsoft.com/en-us/library/windows/desktop/ms644967.aspx) structure carries this information. – IInspectable Jan 09 '17 at 16:15