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How to get Out Long pointers out of an DLL call
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29/09/2003 10:56:23
Tom Johnson
Plymouth Rock Technology, Inc.
Plymouth, Massachusetts, États-Unis
 
 
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Forum:
Visual FoxPro
Catégorie:
Contrôles ActiveX en VFP
Titre:
How to get Out Long pointers out of an DLL call
Divers
Thread ID:
00833153
Message ID:
00833153
Vues:
56
I'm trying to get this call to work in VFP, but have ben unsuccessful so far.

PixelToValue ([in] double x, [in] double y, [out] long *xValue, [out] long *yValue,CfxAxisIndex nYAxis);

Anyone have an idea on how to make this work in VFP? I seem to be hung up on the Out Long pointers. Here is my best guess...but VFP returns OLE Error code # 0x80020005 -- Type Mismatch.

Thanks,

Tom J

LPARAMETERS oSource, nXCoord, nYCoord

LOCAL xOut
LOCAL yOut

xOut=REPLICATE(CHR(0),4)
yOut=REPLICATE(CHR(0),4)

*ChartName.PixelToValue([in] double x, [in] double y,
* [out] long *xValue, [out] long *yValue,CfxAxisIndex nYAxis);

this.pixeltovalue(nXCoord,nyCoord,@xOut,@yOut,0) && problem seems to be with xOut and yOut

? VAL(xout),VAL(yout)
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