Custom button captions in .NET messagebox?

Question

Is there an easy way to display a messagebox in VB.NET with custom button captions? I came across What is an easy way to create a MessageBox with custom button text in

Answer 1

C# code to accomplish the same thing can be found in an article under MSDN forum, https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=3087899&SiteID=1.

Answer 2

The solution by Daniel Nolan, code in VB.Net

<DllImport("kernel32.dll")> _
Private Shared Function GetCurrentThreadId() As UInteger
End Function

<DllImport("user32.dll", CharSet:=CharSet.Auto)> _
Private Shared Function CallNextHookEx(ByVal idHook As Integer, ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As Integer
End Function

<DllImport("user32.dll", CharSet:=CharSet.Auto)> _
Private Shared Function UnhookWindowsHookEx(ByVal idHook As Integer) As Boolean
End Function

<DllImport("user32.dll", CharSet:=CharSet.Auto)> _
Private Shared Function SetWindowsHookEx(ByVal idHook As Integer, ByVal lpfn As HookProc, ByVal hInstance As IntPtr, ByVal threadId As Integer) As Integer
End Function

<DllImport("user32.dll")> _
Private Shared Function SetDlgItemText(ByVal hWnd As IntPtr, ByVal nIDDlgItem As Integer, ByVal lpString As String) As Boolean
End Function

Private Delegate Function HookProc(ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As Integer

Shared dlgHookProc As HookProc

Private Const WH_CBT As Long = 5
Private Const HCBT_ACTIVATE As Long = 5

Private Const ID_BUT_OK As Integer = 1
Private Const ID_BUT_CANCEL As Integer = 2
Private Const ID_BUT_ABORT As Integer = 3
Private Const ID_BUT_RETRY As Integer = 4
Private Const ID_BUT_IGNORE As Integer = 5
Private Const ID_BUT_YES As Integer = 6
Private Const ID_BUT_NO As Integer = 7

Private Const BUT_OK As String = "Save"
Private Const BUT_CANCEL As String = "Cancelar"
Private Const BUT_ABORT As String = "Stop"
Private Const BUT_RETRY As String = "Continue"
Private Const BUT_IGNORE As String = "Ignore"
Private Const BUT_YES As String = "Si"
Private Const BUT_NO As String = "No"

Private Shared _hook As Integer = 0

Private Shared Function DialogHookProc(ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As Integer
  If nCode < 0 Then
    Return CallNextHookEx(_hook, nCode, wParam, lParam)
  End If

  If nCode = HCBT_ACTIVATE Then
    SetDlgItemText(wParam, ID_BUT_OK, BUT_OK)
    SetDlgItemText(wParam, ID_BUT_CANCEL, BUT_CANCEL)
    SetDlgItemText(wParam, ID_BUT_ABORT, BUT_ABORT)
    SetDlgItemText(wParam, ID_BUT_RETRY, BUT_RETRY)
    SetDlgItemText(wParam, ID_BUT_IGNORE, BUT_IGNORE)
    SetDlgItemText(wParam, ID_BUT_YES, BUT_YES)
    SetDlgItemText(wParam, ID_BUT_NO, BUT_NO)
  End If

  Return CallNextHookEx(_hook, nCode, wParam, lParam)
End Function

Private Sub btn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn.Click
  dlgHookProc = New HookProc(AddressOf DialogHookProc)

  _hook = SetWindowsHookEx(CInt(WH_CBT), dlgHookProc, IntPtr.op_Explicit(0), CInt(GetCurrentThreadId()))

  Dim dlgEmptyCheck As DialogResult = MessageBox.Show("Text", "Caption", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button3)


  If dlgEmptyCheck = DialogResult.Abort Then
  End If

  UnhookWindowsHookEx(_hook)
End Sub