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GS Sundar 8GS Sundar 8 

Ensure that the Visualforce page is displayed when a use clicks the New button on the Product object. In Step 3 Advanced Apex specialist

GS Sundar 8GS Sundar 8
<apex:page standardcontroller="Product2" extensions="Product2Extension">
    <apex:sectionHeader title="New Product" subtitle="Add Inventory" />
    <apex:pageMessages id="pageMessages" />
    <apex:form id="form" >
        <apex:actionRegion >
            <apex:pageBlock title="Existing Inventory" id="existingInv">
                <apex:chart data="{!Inventory}" width="600" height="400">
                    <apex:axis type="Category" fields="name" position="left" title="Product Family"/>
                    <apex:axis type="Numeric" fields="val" position="bottom" title="Quantity Remaining"/>
                    <apex:barSeries axis="bottom" orientation="horizontal" xField="val" yField="name"/>
            <apex:pageBlock title="New Products" >
                <apex:pageBlockButtons location="top">
                    <apex:commandButton action="{!save}" value="Save" reRender="existingInv, orderItemTable, pageMessages"/>
                <apex:pageBlockButtons location="bottom">
                    <apex:commandButton action="{!addRows}" value="Add" reRender="orderItemTable, pageMessages" />
                <apex:pageBlockTable value="{!productsToInsert}" var="p" id="orderItemTable" >
                    <apex:column headerValue="{!$ObjectType.Product2.Fields.Name.Label}" >
                        <apex:inputText value="{!p.productRecord.Name}" />
                    <apex:column headerValue="{!$ObjectType.Product2.Fields.Family.Label}" >
                        <apex:selectList value="{!p.productRecord.Family}" size="1" multiselect="false">
                            <apex:selectOptions value="{!FamilyOptions}"></apex:selectOptions>
                    <apex:column headerValue="{!$ObjectType.Product2.Fields.IsActive.Label}" >
                        <apex:inputField value="{!p.productRecord.isActive}" />
                    <apex:column headerValue="{!$ObjectType.PricebookEntry.Fields.UnitPrice.Label}" >
                        <apex:inputText value="{!p.pricebookEntryRecord.UnitPrice}" />
                    <apex:column headerValue="{!$ObjectType.Product2.Fields.Initial_Inventory__c.Label}" >
                        <apex:inputField value="{!p.productRecord.Initial_Inventory__c}" />
Fickle TechieFickle Techie

You need to go the Product Object's "Button, Links and Actions" settings.

Then add Product2New VF Page as an override on the Add Button.User-added image
hello @GS Sundar 8
After doing as @Fickle Techie has explained, you must equaly add Product2New VF Page as an override on the New Button (CreateNewProduct). As bellow:
User-added image
Daniel GabardoDaniel Gabardo
I just want to help anyone that may be stuck on this also.

I've done all of the previous and was unable to complete, I'm Brazilian so my User was in Portuguese, when I changed it to English, it worked.
Noor Hasan 13Noor Hasan 13
User-added image
Noor Hasan 13Noor Hasan 13
hi Daniel Gabardo,
go through this screen shot
Pramod Kumar 101Pramod Kumar 101
Hi Noor,

Be sure that override is done only for Add & New buttons, no need to do override for button "Add to Category".