Getting the Driver Capabilities

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;

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