Drawing on form images

[johncorry]

I have an image on a form and I want to drop a mark on the image using a mouse click. I have setup the Captcha example source code which is working with BMP images but cant call it from the form. Adding this as a procedure in 'on click'  gives page not available. So I have 3 problems seeking advice
1. Is there some way I can call up the captcha source code with a click on the form image.
2.  Can I pass the xy cordinates across accurately
3  I cant get FreeImage to compile . Can I use FreeImage in captcha as I would like to work with png files
Thanks
John

[Bruce]

Hi John,

>> 1. Is there some way I can call up the captcha source code with a click on the form image.

The capatcha is just an image. So the form needs to "request the image" - and presumably you would generate it at run time.
The Capatcha example sort of does this already - albeit in that example the image is not "hidden to begin with". But I guess un-hiding the field is the same as for any other field.

>> 2.  Can I pass the xy cordinates across accurately

I'm not sure what this means. I think you mean you want to know where the user clicked on the image? You would need to write some JavaScript to do that - or possibly create an ImageMap from the image. Both would require a bit of work on your side.

>> 3  I can't get FreeImage to compile.

more information would be needed to comment. Do you have the FreeImage extension installed? Is the DLL in the app folder?


>> Can I use FreeImage in captcha as I would like to work with png files

yes.

cheers
Bruce