>>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.