Need Buy Now Button Code that passes in OrderID and Price Variables

[surfwthsharks]

I have created my own shopping card and checkout, just need to know how to pass Price and OrderID to paypal for payment.  Can anyone help me.  

I have the OrderID and Price already to go...

I tried this, but to no avail...

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">

<input type="hidden" name="cmd" value="<?php echo $OrderID;?>">

<input type="hidden" name="hosted_button_id" value="<?php echo $GrandTotal;?>">

<input type="image" src="https://www.paypalobjects.com/WEBSCR-640-20110306-1/en_US/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">

<img alt="" border="0" src="https://www.paypalobjects.com/WEBSCR-640-20110306-1/en_US/i/scr/pixel.gif" width="1" height="1">

</form>