Title: Callback Function
Last modified: August 22, 2016

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# Callback Function

 *  [dianalbert](https://wordpress.org/support/users/dianalbert/)
 * (@dianalbert)
 * [11 years, 1 month ago](https://wordpress.org/support/topic/callback-function-1/)
 * Hi,
 * I’d like to use the Callback Function type for a couple of fields on the form.
   One to display the states in a dropdown and another to show multiple checkbox.
 * How should I create the filter/function to achieve this?
 * Thanks in advance,
 * D.
 * [https://wordpress.org/plugins/simplr-registration-form/](https://wordpress.org/plugins/simplr-registration-form/)

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## Tags

 * [callback function](https://wordpress.org/support/topic-tag/callback-function/)

 * 0 replies
 * 1 participant
 * Last reply from: [dianalbert](https://wordpress.org/support/users/dianalbert/)
 * Last activity: [11 years, 1 month ago](https://wordpress.org/support/topic/callback-function-1/)
 * Status: not resolved