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8.2

Creating a custom drawn or owner drawn listview in VB.Net

Asked by EvilMungo in .NET

Tags: listview

I need to create a listview that contains a question in the first column, and an answer selection in the second column. The answer column values need to be drawn as buttons so that a user can answer by clicking the appropriate button. I just can't work out how to make the listview owner drawn, and allow my application to draw to the items.

I tried getting the listview to be custom drawn using this code... (Form designer generated code removed)

Imports System.Runtime.InteropServices

Public Class Form1
Inherits System.Windows.Forms.Form

Private Delegate Function DrawProc(ByVal lParam As Long) As Long

Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public Const DWL_MSGRESULT = 0
Public Const DWL_DLGPROC = 4
Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As IntPtr, ByVal nIndex As Long, ByVal dwNewLong As DrawProc) As Long

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

ListView1.Items.Add("Test")
ListView1.Items.Add("Test 2")
ListView1.Items.Add("Test 3")
ListView1.Items.Add("Test 4")

End Sub

Private Function CustomDrawProc(ByVal lparam As Long) As Long
' Can't seem to get any messages coming in here
End Function

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
SetWindowLong(ListView1.Handle, DWL_MSGRESULT, AddressOf CustomDrawProc)
End Sub
End Class

But no messages ever seem to be passed to the CustomDrawProc.

I've found plenty of examples of this in VC++ 6, but none in .Net. I am quite new to programming in .Net and any help and guidance on this would be much appreciated.

20100524-EE-VQP-163