I have a form with 2 fields ID and Message. I am calling this form from a link using index.php?option=com_rsform&view=rsform&formId=29. I need to pass an ID in the link that will display in the ID field and then display the message for the ID from a table. I know how to use the default value of the message field and can get the message if I hardcode the ID number, but can't figure out how to reference the parameter so it displays in the ID field.

I found the post "How do I pass a parameter through the URL and how can I catch it", but not sure what the 'myparameter' is referring to. $myparameter_value = JRequest::getVar('myparameter'); do I need to include 'myparameter' in the url? or just the ID number?

I would so appreciate it if someone would be able to show me what the link would look like if I added the ID of 53 to it. What comes after the form number? index.php?option=com_rsform&view=rsform&formId=29
thanks!

Update:
I was finally able to figure out how to read the parameter passed in the link to open a form.

the link used: (@ID holds the ID of the item clicked on}
index.php?option=com_rsform&view=rsform&formId=29&cid=@ID

the code in the "default value" section of the field that needed to use the parameter
//<code>
$db = JFactory::getDBO();
$myparameter_value = JRequest::getVar('cid');

$db->setQuery("SELECT `subject` FROM `displaytickets` WHERE `id`='".$myparameter_value."' LIMIT 1");
$result = $db->loadResult();
return $result;
//</code>

Works perfectly!