With SharePoint Designer 2010, you can create three types of workflow forms:

INITIATION form: An initiation form gathers information from the workflow participant when they start the workflow. It is automatically generated when you create the workflow in SharePoint Designer 2010. Initiation forms are displayed to users when they manually start a workflow on a given SharePoint item. With an initiation form, users can specify additional PARAMETERS or information about the workflow as it applies to the given SharePoint item.

Task form : A custom task form allows workflow participants to interact with tasks in the Tasks list specified for the workflow. With the Custom Task Wizard, you can easily create custom form fields and add them to a custom task form. When you FINISH designing the workflow, SharePoint Designer 2010 automatically generates the InfoPath or ASP.NET forms for your custom tasks.

Reusable workflow: association form A reusable workflow, by default, only provides the fields common to all items, such as Created and Modified by. This is because a reusable workflow isn’t by default ASSOCIATED with a list, LIBRARY, or content type. An association form enables you to associate fields with a reusable workflow so that the fields will be available when you design and run the workflow.

With SharePoint Designer 2010, you can create three types of workflow forms:

Initiation form: An initiation form gathers information from the workflow participant when they start the workflow. It is automatically generated when you create the workflow in SharePoint Designer 2010. Initiation forms are displayed to users when they manually start a workflow on a given SharePoint item. With an initiation form, users can specify additional parameters or information about the workflow as it applies to the given SharePoint item.

Task form : A custom task form allows workflow participants to interact with tasks in the Tasks list specified for the workflow. With the Custom Task Wizard, you can easily create custom form fields and add them to a custom task form. When you finish designing the workflow, SharePoint Designer 2010 automatically generates the InfoPath or ASP.NET forms for your custom tasks.

Reusable workflow: association form A reusable workflow, by default, only provides the fields common to all items, such as Created and Modified by. This is because a reusable workflow isn’t by default associated with a list, library, or content type. An association form enables you to associate fields with a reusable workflow so that the fields will be available when you design and run the workflow.