>>>I'm wondering if anyone has done that before. I would like to detect the width and height of a GIF file from Visual FoxPro.
>>
>>The dimensions are initialized when you load into an Image control.
>
>I obtained a fast result when using this:
>
>

>* expC1 File name
>PARAMETERS tcFileName
>LOCAL lcHtml,lcFileName
>lcHtml=''
>lcFileName=FILETOSTR(tcFileName)
>lcHtml=lcHtml+'WIDTH='+ALLTRIM(STR(ASC(SUBSTR(lcFileName,8,1))*256+ASC(SUBSTR(lcFileName,7,1))))
>lcHtml=lcHtml+' '
>lcHtml=lcHtml+'HEIGHT='+ALLTRIM(STR(ASC(SUBSTR(lcFileName,10,1))*256+ASC(SUBSTR(lcFileName,9,1))))
>RETURN lcHtml
>

>
>This is done in repetitive way. So, about 20 times in a fraction of a second. If I use the image control for it, I don't know if that would be faster. However, it might be more robust assuming a specific GIF format would be used other than the default one.

Well, you didn't say fast, and I can't attest to the speed of the simple approach. You might also want to review http://www.levelextreme.com/wconnect/wc.dll?FournierTransformation~?2,41,17,616843 if you haven't already. The nice thing about loading into an Image control is that it also covers all of the other supported formats.