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Pooja NekkalapudiPooja Nekkalapudi 

Create a Person Account using a button that opens a VF page from a custom object

My class 
public class CrossSellRExtensionController {
     public Account ca {get; set;}
     public CrossSellRExtensionController(ApexPages.StandardController controller) {
           Cross_Sell_Opportunity__c csr = (Cross_Sell_Opportunity__c) controller.getRecord();
           csr = [Select Id, Name  from Cross_Sell_Opportunity__c where Id =: csr.Id];
           ca = new Account();
           ca.Cross_Sell_Referral__c = csr.Id;
public PageReference save() {
       insert ca;
        PageReference pageRef = new PageReference('/' + ca.Cross_Sell_Referral__c);
        ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'new *contact* created.'));
        return pageRef;
public PageReference cancel() {
     return new PageReference('/'+ ca.Cross_Sell_Referral__c);

And my VF page :
<apex:page standardcontroller="Cross_Sell_Opportunity__c"  extensions="CrossSellRExtensionController">
 <apex:sectionHeader title="Title" subtitle="Person Accounts"/>
    <apex:form >
      <apex:outputPanel >
        <apex:pageMessages />
        <apex:pageBlock title="Please fill in the details for creating *Contacts*">
      <apex:pageBlockSection >
        <apex:inputField value="{!ca.RecordTypeId}" required="true"/><br/>
        <apex:inputField value="{!Cross_Sell_Opportunity__c.Name}" required="true"/><br/>
        <apex:inputField value="{!ca.Salutation}" /> &nbsp;
            <apex:inputField value="{!ca.FirstName}"  /><br/>
            <apex:inputField value="{!ca.LastName}"  required="true"/><br/>
             <apex:inputField value="{!ca.Name}" required="true"/><br/>
             <apex:inputField value="{!ca.PersonEmail}" required="true"/><br/>
              <apex:inputField value="{!ca.Status__c}" /><br/>
        <apex:pageBlockButtons >
            <apex:commandButton action="{!save}" value="Save" /> 
            <apex:commandButton action="{!cancel}" value="Cancel"/>



I am having trouble to create a person account and the VF page first name and last name are not editable they dont give a box to type in values , what can be done and also before I create a new Person Account , is there a way I coyld do a vlookup on the contact ( if firstname , lastName and email Id given thru VF page already exists ) and throw error saying contact already exists 
  1. Try creating an <apex:inputText> tag instead of input field. 
  2. vlookup are formula based function, u can't use them here in code. u have to do a SOQL with these conditions and find out if it whether they exist or not in the DB. Based on result u can throw the error msg.