PsychError SCREENSetMouseHelper(void)
{
    int	screenNumber;
    int xPos, yPos;
    int deviceIdx = -1;
    int detachFromMouse = 0;

    //all subfunctions should have these two lines.
    PsychPushHelp(useString, synopsisString, seeAlsoString);
    if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};

    PsychErrorExit(PsychCapNumInputArgs(5));   //The maximum number of inputs
    PsychErrorExit(PsychCapNumOutputArgs(0));  //The maximum number of outputs

    PsychCopyInScreenNumberArg(1, TRUE, &screenNumber);
    PsychCopyInIntegerArg(2,TRUE, &xPos);
    PsychCopyInIntegerArg(3,TRUE, &yPos);
    PsychCopyInIntegerArg(4,FALSE, &deviceIdx);
    PsychCopyInIntegerArg(5,FALSE, &detachFromMouse);

    // Position the cursor. On OSX this will also automatically attach it
    // to mouse movement:
    PsychPositionCursor(screenNumber, xPos, yPos, deviceIdx);

    #if PSYCH_SYSTEM == PSYCH_OSX
        if (detachFromMouse) CGAssociateMouseAndMouseCursorPosition(false);
    #endif

    return(PsychError_none);
}
PsychError SCREENSetMouseHelper(void) 
{
	int	screenNumber;
	int 	xPos, yPos;
	int     deviceIdx = -1;

	//all subfunctions should have these two lines.
	PsychPushHelp(useString, synopsisString, seeAlsoString);
	if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
	
	PsychErrorExit(PsychCapNumInputArgs(4));   //The maximum number of inputs
	PsychErrorExit(PsychCapNumOutputArgs(0));  //The maximum number of outputs
        
	PsychCopyInScreenNumberArg(1, TRUE, &screenNumber);
	PsychCopyInIntegerArg(2,TRUE, &xPos);
	PsychCopyInIntegerArg(3,TRUE, &yPos);
	PsychCopyInIntegerArg(4,FALSE, &deviceIdx);

	PsychPositionCursor(screenNumber, xPos, yPos, deviceIdx);

	return(PsychError_none);
}