编辑：
我正在使用这个自定义消息框，消息框可以接收自定义字体，我正在寻找能够通过调整消息框窗口大小在默认消息框窗口旁边使用大字体大小的方法。
但是按照@ endofzero的说明，我在调整窗口大小时发现了一个问题，它不足以解决自定义字体大小问题，如果我使用大尺寸字体，那么字体将显示为“截断”，我的意思是裁剪，甚至如果我使用高分辨率调整消息框窗口的大小，那么文本仍然对齐到左上角，并且像在一个小框中一样被裁剪显示。
所以我想我还需要调整包含消息框表单中文本消息的控件的大小，或者我完全想念的其他东西，但这可能会调整大小？如何？
（这个自定义消息框由 Hans Passant 编写，我稍作修改：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
使用示例：
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