<pre lang="sql">I have to create a Leave approval workflow where User submit leave request
1) Which goes to manager at the same time it get updated in Calendar and also both manager and user received email.
2)When manager approved or reject the request. User should get email whether it reject or approved and also Leave request should get deleted from Calendar
If any one could jst tell me regarding simple workflow of approval and rejection will also do.</pre>
First you should tell us a little bit more about the system you use:
Should it be a solutions, a workflow with SharePoint Designer or do you use a third party tool like nintex?
If you use SharePoint Designer you could draw your workflow with Visio Premium. Just start a SharePoint workflow. You can use the SharePoint-Components for creating or deleting items (such as calendar entries), create tasks and add or remove rights, depending on a state or values.
It's very easy. Same for nintex.
Best: Always start by drawing the Workflow as Diagramm (UML for example or Visio SharePoint Workflow).