How to respond to events for objects in an array - arrays

Question

I have made an array of tiles (pictureboxes) in an array and need them to all do something when clicked, but don't know how. Specifically, I want to be able to place some other object on them by clicking a tile and making that object go to that tile's location. I know you may suggest looking at the mouseposition variable and having some invisible box over all the tiles to register clicks, but I would like to know how to register any event for an object in an array for anything that comes up in the future. I do know how to register events for objects which aren't in an array by the way.
The object I want to move on top of the picturebox will also be from an object array, but a different one.
Here is my code:
Public Class Form1
Dim tiles(50) As PictureBox 'This is the object array of tiles
Dim plants() As String 'I haven't set this up yet, but this will be for the objects to be 'placed' on the pictureboxes.
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Dim tileWidth As Integer = 50
Dim tileHeight As Integer = 50
Dim xindent As Integer = 10
Dim yindent As Integer = 10
For x = 0 To 9
For y = 0 To 4
ReDim Preserve tiles(x * y)
tiles(x * y) = New PictureBox With {.Visible = True, .Size = New System.Drawing.Size(50, 50), .Parent = Me, .BackColor = Color.GreenYellow, .Image = Nothing}
tiles(x * y).Location = New System.Drawing.Point(x * tileWidth + xindent, y * tileHeight + yindent)
If (x Mod 2 = 0 And y Mod 2 = 0) Or (x Mod 2 <> 0 And y Mod 2 <> 0) Then
tiles(x * y).BackColor = Color.Green
End If
Next
Next
End Sub
End Class
I simply don't know how to set up the click event handler for the array of tiles so that's why its not in the code above.
Thanks in advance for your help.

Answer 1

AddHandler is there for that. After the New you just need to attach a function to the event
AddHandler tiles(x * y).Click, AddressOf Tile_Click
And have a function that handles the event
Private Sub Tile_Click(sender As Object, e As System.EventArgs)
' sender represent the reference to the picture box that was clicked
End Sub
If you already know the size of the array, you should ReDim your array just once instead of each time you loop (Move the ReDim out of the loops). Also, since y is 0 on the first loop, you are basically doing a ReDim of 0 elements (x*y = 0 when y = 0)

Answer 2

the_lotus has already given you a great answer.
Just wanted to share a trick I often use when wiring up events with AddHandler.
Declare a temporary variable using WithEvents in your class:
Public Class Form1
Private WithEvents Tile As PictureBox
...
Now, in the two DropDowns across the top of code editor, change Form1 to Tile, and (Declarations) to Click (or whatever event you want). This will enter a method for you that has the correct method signature:
Private Sub Tile_Click(sender As Object, e As EventArgs) Handles Tile.Click
End Sub
Delete the Handles Tile.Click portion that appears at the end of the first line:
Private Sub Tile_Click(sender As Object, e As EventArgs)
End Sub
Finally, remove your temporary declaration that used WithEvents.
Now you've got a method with the correct signature that you can use with AddHandler. This is very handy for events that don't have the standard signature.