i have a requirement wherein I have a button on my VF page XYZ_VF

1.The button needs to open a create record page of an custom object 2.Also when the standard create page is displayed,its lookup field should be prepopulated

How can i extend the below code to implement my functionality?

Note:I am using custom controller

below is my code:

<apex:commandButton value="Add Killer Checks" action="!URLFOR($Action.DisplayCheck__c.New,$CurrentPage.Name,[CF00N20000009H4jV=$CurrentPage.Parameters.vname,CF00N20000009H4jV_lkid=$CurrentPage.Parameters.id])}" style="float:center"/>

i get the below error:

Invalid parameter for function URLFOR Error is in expression '{!URLFOR($Action.DisplayCheck__c.New,$CurrentPage.Name)}' in component apex:commandButton in page visitaudit_vf

Please help THanks

i have a requirement wherein I have a button on my VF page XYZ_VF

1.The button needs to open a create record page of an custom object 2.Also when the standard create page is displayed,its lookup field should be prepopulated

How can i extend the below code to implement my functionality?

Note:I am using custom controller

below is my code:

<apex:commandButton 
    value="Add Killer Checks" 
    action="!URLFOR($Action.DisplayCheck__c.New,$CurrentPage.Name,[CF00N20000009H4jV=$CurrentPage.Parameters.vname,CF00N20000009H4jV_lkid=$CurrentPage.Parameters.id])}" 
    style="float:center"/>

I get the below error:

Invalid parameter for function URLFOR Error is in expression '{!URLFOR($Action.DisplayCheck__c.New,$CurrentPage.Name)}' in component apex:commandButton in page visitaudit_vf

Please help THanks