When using the MCA SDK for development on your PC, it is likely that is does not have peripheral control buttons. The MCA SDK provides a way to simulate button presses and is already preconfigured for button simulation. When the MCA SDK ToolTray application is configured for button simulation, the keystrokes in the following list will, by default, simulate button keystrokes for the associated peripherals:
Shift-F1 = ButtonTypeBarcode
Shift-F2 = ButtonTypeRfid
Shift-F3 = ButtonTypePicture
Shift-F4 = ButtonTypeMedAppA
Shift-F5 = ButtonTypeMedAppB
For example, pressing Shift-F1 will simulate pressing the barcode reader button when the ToolTray application is running. See the MCA Developers Guide for more detail.
Note that if your application is running on an OEM's MCA product like the Motion C5, button simulation is unnecessary because you can use the physical buttons.