<mx:VBox 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    xmlns="*">
    
    
        <mx:Grid id="myGrid">
        
        
            <mx:GridRow>
                <mx:GridItem>
                    <mx:Button id="b1" label="R1C1" width="55"/>
                </mx:GridItem>
                <mx:GridItem>
                    <mx:Button id="b2" label="R1C2" width="55"/>
                </mx:GridItem>
                <mx:GridItem>
                    <mx:Button id="b3" label="R1C3" width="55"/>
                </mx:GridItem>
            </mx:GridRow>

            <mx:GridRow>
                <mx:GridItem>
                    <mx:Button id="b4" label="R2C1" width="55"/>
                </mx:GridItem>
                <mx:GridItem>
                    <mx:Button id="b5" label="R2C2" width="55"/>
                </mx:GridItem>
                <mx:GridItem>
                    <mx:Button id="b6" label="R2C3" width="55"/>
                </mx:GridItem>
            </mx:GridRow>

            <mx:GridRow>
                <mx:GridItem>
                    <mx:Button id="b7" label="R3C1" width="55"/>
                </mx:GridItem>
                <mx:GridItem>
                    <mx:Button id="b8" label="R3C2" width="55"/>
                </mx:GridItem>
                <mx:GridItem>
                    <mx:Button id="b9" label="R3C3" width="55"/>
                </mx:GridItem>
            </mx:GridRow>
            
            
        </mx:Grid>
        
        
     <mx:TextInput id="ti"/>
     
     
</mx:VBox>