I'm adapting Yair Alan Griver's example of a decorator class, from the May 1998 issue of FoxPro Advisor, for another library file, Graphics Server. One of the commands I'm trying to wrap, passes an array by reference. When I run it I'm getting the following error message:
Function argument value, type, or count is invalid (Error 11)

I'm using the syntax below:
oGraph.GSDataAmp(ALEN(gaData,1),ALEN(gaData,2),@gaData[1,1])

The actual method code is:
PROCEDURE GSDataAmp
LPARAMETERS tnRows,tnColumns,taData
LOCAL lnRetVal
lnRetVal = -1
IF PARAMETERS() = 3
lnRetVal = (GSDataAmp(tnRows,tnColumns,@taData[1,1]))
ENDIF PARAMETERS() = 3
RETURN (lnRetVal)
ENDPROC

What I'm doing wrong and how do I correct it?

Thanks,

Dan Rhymes