Private Sub InitializePictureBox()
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.PictureBox1.BorderStyle = _
            System.Windows.Forms.BorderStyle.FixedSingle
        Me.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage
        Me.PictureBox1.Location = New System.Drawing.Point(72, 112)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(160, 136)
        Me.PictureBox1.TabStop = False
    End Sub

    Private Sub InitializeOpenFileDialog()
        Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog

        ' Set the file dialog to filter for graphics files.
        Me.OpenFileDialog1.Filter = _
        "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*"

        ' Allow the user to select multiple images.
        Me.OpenFileDialog1.Multiselect = True
        Me.OpenFileDialog1.Title = "My Image Browser"
    End Sub

    Private Sub fileButton_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles FileButton.Click
        OpenFileDialog1.ShowDialog()
    End Sub


    ' This method handles the FileOK event.  It opens each file 
    ' selected and loads the image from a stream into PictureBox1.
    Private Sub OpenFileDialog1_FileOk(ByVal sender As Object, _
    ByVal e As System.ComponentModel.CancelEventArgs) _
     Handles OpenFileDialog1.FileOk

        Me.Activate()
        Dim file, files() As String
        files = OpenFileDialog1.FileNames

        ' Open each file and display the image in PictureBox1.
        ' Call Application.DoEvents to force a repaint after each
        ' file is read.        
        For Each file In files
            Dim fileInfo As System.IO.FileInfo = New System.IO.FileInfo(file)
            Dim fileStream As System.IO.FileStream = fileInfo.OpenRead()
            PictureBox1.Image = System.Drawing.Image.FromStream(fileStream)
            Application.DoEvents()
            fileStream.Close()

            ' Call Sleep so the picture is briefly displayed, 
            'which will create a slide-show effect.
            System.Threading.Thread.Sleep(2000)
        Next
        PictureBox1.Image = Nothing
    End Sub

    private void InitializePictureBox()
    {
        this.pictureBox1 = new System.Windows.Forms.PictureBox();
        this.pictureBox1.BorderStyle = 
            System.Windows.Forms.BorderStyle.FixedSingle;
        this.pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
        this.pictureBox1.Location = new System.Drawing.Point(72, 112);
        this.pictureBox1.Name = "pictureBox1";
        this.pictureBox1.Size = new System.Drawing.Size(160, 136);
        this.pictureBox1.TabIndex = 6;
        this.pictureBox1.TabStop = false;
    }

    private void InitializeOpenFileDialog()
    {
        this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();

        // Set the file dialog to filter for graphics files.
        this.openFileDialog1.Filter = 
            "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" + 
            "All files (*.*)|*.*";

        // Allow the user to select multiple images.
        this.openFileDialog1.Multiselect = true;
        this.openFileDialog1.Title = "My Image Browser";
        
    }

    private void fileButton_Click(System.Object sender, System.EventArgs e)
    {
        openFileDialog1.ShowDialog();
    }


    // This method handles the FileOK event.  It opens each file 
    // selected and loads the image from a stream into pictureBox1.
    private void openFileDialog1_FileOk(object sender, 
        System.ComponentModel.CancelEventArgs e)
    {

        this.Activate();
         string[] files = openFileDialog1.FileNames;

        // Open each file and display the image in pictureBox1.
        // Call Application.DoEvents to force a repaint after each
        // file is read.        
        foreach (string file in files )
        {
            System.IO.FileInfo fileInfo = new System.IO.FileInfo(file);
            System.IO.FileStream fileStream = fileInfo.OpenRead();
            pictureBox1.Image = System.Drawing.Image.FromStream(fileStream);
            Application.DoEvents();
            fileStream.Close();

            // Call Sleep so the picture is briefly displayed, 
            //which will create a slide-show effect.
            System.Threading.Thread.Sleep(2000);
        }
        pictureBox1.Image = null;
    }

void InitializePictureBox()
{
   this->PictureBox1 = gcnew System::Windows::Forms::PictureBox;
   this->PictureBox1->BorderStyle =
      System::Windows::Forms::BorderStyle::FixedSingle;
   this->PictureBox1->SizeMode = PictureBoxSizeMode::StretchImage;
   this->PictureBox1->Location = System::Drawing::Point( 72, 112 );
   this->PictureBox1->Name = "PictureBox1";
   this->PictureBox1->Size = System::Drawing::Size( 160, 136 );
   this->PictureBox1->TabIndex = 6;
   this->PictureBox1->TabStop = false;
}

void InitializeOpenFileDialog()
{
   this->OpenFileDialog1 = gcnew System::Windows::Forms::OpenFileDialog;

   // Set the file dialog to filter for graphics files.
   this->OpenFileDialog1->Filter =
      "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" +
      "All files (*.*)|*.*";

   // Allow the user to select multiple images.
   this->OpenFileDialog1->Multiselect = true;
   this->OpenFileDialog1->Title = "My Image Browser";
}

void fileButton_Click( System::Object^ sender, System::EventArgs^ e )
{
   OpenFileDialog1->ShowDialog();
}

// This method handles the FileOK event.  It opens each file 
// selected and loads the image from a stream into PictureBox1.
void OpenFileDialog1_FileOk( Object^ sender,
   System::ComponentModel::CancelEventArgs^ e )
{
   this->Activate();
   array<String^>^ files = OpenFileDialog1->FileNames;

   // Open each file and display the image in PictureBox1.
   // Call Application.DoEvents to force a repaint after each
   // file is read.        
   for each ( String^ file in files )
   {
      System::IO::FileInfo^ fileInfo = gcnew System::IO::FileInfo( file );
      System::IO::FileStream^ fileStream = fileInfo->OpenRead();
      PictureBox1->Image = System::Drawing::Image::FromStream( fileStream );
      Application::DoEvents();
      fileStream->Close();

      // Call Sleep so the picture is briefly displayed, 
      //which will create a slide-show effect.
      System::Threading::Thread::Sleep( 2000 );
   }
   PictureBox1->Image = nullptr;
}

To run this example paste the following code in a form containing
a PictureBox named PictureBox1, an OpenFileDialog named OpenFileDialog1, 
and a button named fileButton.  Call the InitializePictureBox and 
InitializeOpenFileDialog methods from the form's constructor or 
Load method. When the example is running, display the dialog by clicking
the button.