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Getting the Driver Capabilities

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The following example uses joyGetNumDevs and joyGetPos to determine whether the joystick services are available and if a joystick is attached to one of the ports.

JOYINFO joyinfo; 
UINT wNumDevs, wDeviceID; 
BOOL bDev1Attached, bDev2Attached; 
 
    if((wNumDevs = joyGetNumDevs()) == 0) 
        return ERR_NODRIVER; 
    bDev1Attached = joyGetPos(JOYSTICKID1,&joyinfo) != JOYERR_UNPLUGGED; 
    bDev2Attached = wNumDevs == 2 && joyGetPos(JOYSTICKID2,&joyinfo) != 
        JOYERR_UNPLUGGED; 
    if(bDev1Attached || bDev2Attached)   // decide which joystick to use 
        wDeviceID = bDev1Attached ? JOYSTICKID1 : JOYSTICKID2; 
    else 
        return ERR_NODEVICE;