Q: JOYCAPS typedef & joyGetDevCaps() function

Declared in C++ as:

typedef struct tagJOYCAPSA {
WORD    wMid;                /* manufacturer ID */
WORD    wPid;                /* product ID */
CHAR    szPname[MAXPNAMELEN];/* product name (NULL terminated
string) */
UINT    wXmin;               /* minimum x position value */
UINT    wXmax;               /* maximum x position value */
UINT    wYmin;               /* minimum y position value */
UINT    wYmax;               /* maximum y position value */
UINT    wZmin;               /* minimum z position value */
UINT    wZmax;               /* maximum z position value */
UINT    wNumButtons;         /* number of buttons */
UINT    wPeriodMin;          /* minimum message period when
captured */
UINT    wPeriodMax;          /* maximum message period when
captured */
#if (WINVER >= 0x0400)
UINT    wRmin;               /* minimum r position value */
UINT    wRmax;               /* maximum r position value */
UINT    wUmin;               /* minimum u (5th axis) position
value */
UINT    wUmax;               /* maximum u (5th axis) position
value */
UINT    wVmin;               /* minimum v (6th axis) position
value */
UINT    wVmax;               /* maximum v (6th axis) position
value */
UINT    wCaps;	 	 /* joystick capabilites */
UINT    wMaxAxes;	 	 /* maximum number of axes supported */
UINT    wNumAxes;	 	 /* number of axes in use */
UINT    wMaxButtons;	 /* maximum number of buttons supported */
CHAR    szRegKey[MAXPNAMELEN];/* registry key */
CHAR    szOEMVxD[MAX_JOYSTICKOEMVXDNAME]; /* OEM VxD in use */
#endif

MMRESULT joyGetDevCaps(UINT_PTR  uJoyID,LPJOYCAPS pjc,UINT cbjc);

...and for Clarion:

JOYCAPS            GROUP,TYPE,PRE()
wMid                 SIGNED
wPid                 SIGNED
szPname              CSTRING(1000),DIM(32)
wXmin                UNSIGNED
wXmax                UNSIGNED
wYmin                UNSIGNED
wYmax                UNSIGNED
wZmin                UNSIGNED
wZmax                UNSIGNED
wNumButtons          UNSIGNED
wPeriodMin           UNSIGNED
wPeriodMax           UNSIGNED
wRmin                UNSIGNED
wRmax                UNSIGNED
wUmin                UNSIGNED
wUmax                UNSIGNED
wVmin                UNSIGNED
wVmax                UNSIGNED
wCaps                UNSIGNED
wMaxAxes             UNSIGNED
wNumAxes             UNSIGNED
wMaxButtons          UNSIGNED
szRegKey             CSTRING(1000),DIM(32)
szOEMVxD             CSTRING(1000),DIM(260)
END

 joyGetDevCapsA(LONG,*JOYCAPS,LONG),LONG,
PASCAL,RAW

Is this correct?

In Clarion, it doesn't return any results and I don't understand why
not. When Visual c++ is used, it works okay.

Thanks in advance for any help!
-Rick