EDIT:
I'm using this custom messagebox, the messagebox can receive a custom font, I'm looking for the way to be able to use big font sizes niside the default messagebox window by resizing the messagebox window.
But following the @endofzero instructions I've found a problem when resizing the window it is not sufficient to solve the custom font size problem, if I use a big size font then the font will be displayed 'truncated', I mean cropped, even If I resize the messagebox window using a high resolution, no way, the text stills alligned to top-left and is displayed cropped like in a little box.
So I imagine that I will need to resize also the control who contains the text message inside the messagebox form, or something else that I totally miss, but this is possibly to resize? and how?
( This custom messagebox is written by Hans Passant and modified a little by me: MessageBox with custom font? )
#Region " Centered MessageBox Class"
Imports System.Drawing
Imports System.Runtime.InteropServices
Imports System.Text
Imports System.Windows.Forms
Class CenteredMessageBox : Implements IDisposable
Private mTries As Integer = 0
Private mOwner As Form
Private mFont As Font
' P/Invoke declarations
Private Const WM_SETFONT As Integer = &H30
Private Const WM_GETFONT As Integer = &H31
Private Delegate Function EnumThreadWndProc(hWnd As IntPtr, lp As IntPtr) As Boolean
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Private Shared Function EnumThreadWindows(tid As Integer, callback As EnumThreadWndProc, lp As IntPtr) As Boolean
End Function
<DllImport("kernel32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Private Shared Function GetCurrentThreadId() As Integer
End Function
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Private Shared Function GetClassName(hWnd As IntPtr, buffer As StringBuilder, buflen As Integer) As Integer
End Function
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Private Shared Function GetDlgItem(hWnd As IntPtr, item As Integer) As IntPtr
End Function
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Private Shared Function SendMessage(hWnd As IntPtr, msg As Integer, wp As IntPtr, lp As IntPtr) As IntPtr
End Function
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Shared Function GetWindowRect(hWnd As IntPtr, ByRef rc As RECT) As Boolean
End Function
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Shared Function MoveWindow(hWnd As IntPtr, x As Integer, y As Integer, w As Integer, h As Integer, repaint As Boolean) As Boolean
End Function
Structure RECT
Public Left As Integer
Public Top As Integer
Public Right As Integer
Public Bottom As Integer
End Structure
Public Sub New(owner As Form, Optional Custom_Font As Font = Nothing)
mOwner = owner
mFont = Custom_Font
owner.BeginInvoke(New MethodInvoker(AddressOf findDialog))
End Sub
Private Sub findDialog()
' Enumerate windows to find the message box
If mTries < 0 Then
Return
End If
Dim callback As New EnumThreadWndProc(AddressOf checkWindow)
If EnumThreadWindows(GetCurrentThreadId(), callback, IntPtr.Zero) Then
If System.Threading.Interlocked.Increment(mTries) < 10 Then
mOwner.BeginInvoke(New MethodInvoker(AddressOf findDialog))
End If
End If
End Sub
Private Function checkWindow(hWnd As IntPtr, lp As IntPtr) As Boolean
' Checks if <hWnd> is a dialog
Dim sb As New StringBuilder(260)
GetClassName(hWnd, sb, sb.Capacity)
If sb.ToString() <> "#32770" Then Return True
' Got it, get the STATIC control that displays the text
Dim hText As IntPtr = GetDlgItem(hWnd, &HFFFF)
Dim frmRect As New Rectangle(mOwner.Location, mOwner.Size)
Dim dlgRect As RECT
GetWindowRect(hWnd, dlgRect)
MoveWindow(hWnd, frmRect.Left + (frmRect.Width - dlgRect.Right + dlgRect.Left) \ 2, frmRect.Top + (frmRect.Height - dlgRect.Bottom + dlgRect.Top) \ 2, dlgRect.Right - dlgRect.Left, dlgRect.Bottom - dlgRect.Top, True)
If hText <> IntPtr.Zero Then
If mFont Is Nothing Then
' Get the current font
mFont = Font.FromHfont(SendMessage(hText, WM_GETFONT, IntPtr.Zero, IntPtr.Zero))
End If
SendMessage(hText, WM_SETFONT, mFont.ToHfont(), New IntPtr(1))
End If
' Done
Return False
End Function
Public Sub Dispose() Implements IDisposable.Dispose
mTries = -1
mOwner = Nothing
If mFont IsNot Nothing Then mFont.Dispose()
End Sub
End Class
#End Region
Usage example:
Using New CenteredMessageBox(Me, New Font(New FontFamily("Lucida Console"), Font.SizeInPoints, FontStyle.Bold))
MessageBox.Show("Test Text", "Test Title", MessageBoxButtons.OK, MessageBoxIcon.Information)
End Using
