Simply set up a form handler and map the input name of your hidden field to the appropriate Account Engagement field. The data will pass through just like any other field during the post.
1. Create an Account Engagement custom field with the type Hidden. Note the Field ID of your field, which you'll need to append to your form URL. The field ID can be found on the field page.
2. Edit your form and add your hidden field using the Form Wizard's drag-and-drop form builder.
3. IMPORTANT: Make sure that you enable the setting on the hidden field to "Always display even if previously completed" (under the Advanced tab when editing your field) if you are using this form in more than one place.
4. Append the Field ID as a URL parameter to the end of your iframe URL for each form and also include the value.
If your iframe URL were:
<iframe src="http://go.exmample.com/l/1/2007-06-27/101"></iframe>
Then your new URL would be:
<iframe src="http://go.example.com/l/1/2007-06-27/101?Field_ID=value"></iframe>
The Field_ID parameter is the field ID for your custom field, and value is the value you wish to have added to the prospect record. This would be different for each form. For example, if your hidden field is intended to contain the name of the completed form, the iframe URL would read:
http://go.example.com/l/1/2007-06-27/101?form_submitted=whitepaperform
If you don't want to hardcode a parameter in your iframe source, or if the value that's passed to the iframed form is dynamic, you can use a different method to pass the values. See Passing URL Parameters from Browser to iFrame for more information.
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