VB.Net Tutorial/2D Graphics/MetaFile WMF

Create a Metafile

Imports System.Drawing.Imaging
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MetafileHeaderInfo
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
public class Form1
  Inherits System.Windows.Forms.Form
  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = Me.CreateGraphics()
        Dim hdc As IntPtr = g.GetHdc()
        Dim rect As New Rectangle(20, 20, 200, 100)
        Dim curMetafile As New Metafile(hdc, EmfType.EmfPlusDual, "yourfile.emf")
        Dim g1 As Graphics = Graphics.FromImage(curMetafile) "
        g1.SmoothingMode = SmoothingMode.HighQuality
        g1.FillRectangle(Brushes.Red, rect)
        rect.Y += 110
        g1.DrawEllipse(New Pen(Brushes.Green, 3), rect)
        g1.DrawLine(Pens.Blue, New Point(20, 20), New Point(400, 200))
        "Release objects
        g.ReleaseHdc(hdc)
        g1.Dispose()
        g.Dispose()
  End Sub
  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
  End Sub
End Class

Draw a meta wmf file

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Imports System.Windows.Forms
public class MetafileDraw
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
public class Form1
  Inherits System.Windows.Forms.Form
  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)
        Dim curMetafile As New Metafile("yourfile.wmf")
        g.DrawImage(curMetafile, 0, 0)
        g.Dispose()
  End Sub
  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
  End Sub
End Class

Draw on a wmf file

Imports System.Drawing.Imaging
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawOnWMFFile
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
public class Form1
  Inherits System.Windows.Forms.Form
  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim curMetafile As Metafile = Nothing
        Dim g As Graphics = Me.CreateGraphics()
        Dim hdc As IntPtr = g.GetHdc()
        Dim rect As New Rectangle(0, 0, 200, 200)
        curMetafile = New Metafile("newFile.wmf", hdc)

        Dim g1 As Graphics = Graphics.FromImage(curMetafile)
        g1.SmoothingMode = SmoothingMode.HighQuality
        g1.FillRectangle(Brushes.Green, rect)
        rect.Y += 110
        Dim lgBrush As New LinearGradientBrush(rect, Color.Red, Color.Blue, 45.0F)
        g1.FillEllipse(lgBrush, rect)
        rect.Y += 110
        g1.DrawString("MetaFile Sample", New Font("Verdana", 20), lgBrush, 200, 200, StringFormat.GenericTypographic)
        g.ReleaseHdc(hdc)
        g1.Dispose()
        g.Dispose()
  End Sub
  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
  End Sub
End Class

Make Metafile (WMF)

Imports System.Drawing.Imaging
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
Imports System.Math
public class WMFFileCreate
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Const WID As Integer = 200
        Dim file_name As String = "test.wmf"
        Dim me_gr As Graphics = Me.CreateGraphics
        Dim me_hdc As IntPtr = me_gr.GetHdc
        Dim bounds As New RectangleF(0, 0, WID, WID)
        Dim mf As New Metafile(file_name, me_hdc, bounds, MetafileFrameUnit.Pixel)
        me_gr.ReleaseHdc(me_hdc)
        Dim gr As Graphics = Graphics.FromImage(mf)
        gr.PageUnit = GraphicsUnit.Pixel
        gr.Clear(Color.White)
        gr.DrawEllipse(Pens.Red, bounds)
        gr.DrawLine(Pens.Blue, 0, 0, WID, WID)
        gr.DrawLine(Pens.Blue, WID, 0, 0, WID)
        gr.Dispose()
        mf.Dispose()
        mf = New Metafile(file_name)
        Dim bm As New Bitmap(WID, WID)
        gr = Graphics.FromImage(bm)
        Dim dest_bounds As New RectangleF(0, 0, WID, WID)
        Dim source_bounds As New RectangleF(0, 0, WID + 1, WID + 1)
        gr.DrawImage(mf, bounds, source_bounds, GraphicsUnit.Pixel)
        picOrig.SizeMode = PictureBoxSizeMode.AutoSize
        picOrig.Image = bm
        gr.Dispose()
        mf.Dispose()
        mf = New Metafile(file_name)
        picSmall.SetBounds(picOrig.Right + 10, picOrig.Top,picOrig.Width \ 2, picOrig.Height \ 2)
        bm = New Bitmap(picSmall.ClientSize.Width,picSmall.ClientSize.Height)
        gr = Graphics.FromImage(bm)
        gr.ScaleTransform(0.5, 0.5)
        gr.DrawImage(mf, bounds, source_bounds, GraphicsUnit.Pixel)
        picSmall.Image = bm
        gr.Dispose()
        mf.Dispose()
    End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.IContainer
    "NOTE: The following procedure is required by the Windows Form Designer
    "It can be modified using the Windows Form Designer.  
    "Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.picSmall = New System.Windows.Forms.PictureBox
        Me.picOrig = New System.Windows.Forms.PictureBox
        CType(Me.picSmall, System.ruponentModel.ISupportInitialize).BeginInit()
        CType(Me.picOrig, System.ruponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        "
        "picSmall
        "
        Me.picSmall.Location = New System.Drawing.Point(64, 8)
        Me.picSmall.Name = "picSmall"
        Me.picSmall.Size = New System.Drawing.Size(32, 24)
        Me.picSmall.TabIndex = 3
        Me.picSmall.TabStop = False
        "
        "picOrig
        "
        Me.picOrig.Location = New System.Drawing.Point(8, 8)
        Me.picOrig.Name = "picOrig"
        Me.picOrig.Size = New System.Drawing.Size(48, 56)
        Me.picOrig.TabIndex = 2
        Me.picOrig.TabStop = False
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(326, 215)
        Me.Controls.Add(Me.picSmall)
        Me.Controls.Add(Me.picOrig)
        Me.Name = "Form1"
        Me.Text = "MakeMetafile"
        CType(Me.picSmall, System.ruponentModel.ISupportInitialize).EndInit()
        CType(Me.picOrig, System.ruponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
    End Sub
    Friend WithEvents picSmall As System.Windows.Forms.PictureBox
    Friend WithEvents picOrig As System.Windows.Forms.PictureBox
End Class

Set EnumerateMetafileProc property

Imports System.Drawing
Imports System.Drawing.Imaging
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class EnumerateMetafileProc
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
public class Form1
  Inherits System.Windows.Forms.Form
  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)
        Dim curMetafile As New Metafile("mtfile.wmf")
        Dim enumMetaCB1 As New Graphics.EnumerateMetafileProc(AddressOf EnumMetaCB)
        g.EnumerateMetafile(curMetafile, New Point(0, 0), EnumMetaCB1)
        curMetafile.Dispose()
        g.Dispose()
  End Sub
    Private Function EnumMetaCB(ByVal recordType As EmfPlusRecordType, ByVal flags As Integer, ByVal dataSize As Integer, ByVal data As IntPtr, ByVal callbackData As PlayRecordCallback) As Boolean "
        Dim str As String = ""
        " Play only EmfPlusRecordType.FillEllipse records.
        If recordType = EmfPlusRecordType.FillEllipse Or recordType = EmfPlusRecordType.FillRects Or recordType = EmfPlusRecordType.DrawEllipse Or recordType = EmfPlusRecordType.DrawRects Then
            str = "Record type:" + recordType.ToString() + ", Flags:" + flags.ToString() + ", DataSize:" + dataSize.ToString() + ", Data:" + data.ToString()
            MessageBox.Show(str)
        End If
        Return True
    End Function "EnumMetaCB
  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
  End Sub
End Class