Bitmap.GetHicon Bitmap.GetHicon Bitmap.GetHicon Bitmap.GetHicon Method

定義

アイコンへのハンドルを返します。Returns the handle to an icon.

public:
 IntPtr GetHicon();
public IntPtr GetHicon ();
member this.GetHicon : unit -> nativeint
Public Function GetHicon () As IntPtr

戻り値

Bitmap と同じイメージを持つアイコンへの Windows ハンドル。A Windows handle to an icon with the same image as the Bitmap.

例外

操作に失敗しました。The operation failed.

次のコード例は、Windows フォームで使用するように設計されています。また、Paint イベントハンドラーのパラメーターである @no__t 0 の @ no__t-1 が必要です。The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. コードは、次のアクションを実行します。The code performs the following actions:

  • Bitmap を作成します。Creates a Bitmap.

  • そのオブジェクトを画面に描画します。Draws that object to the screen.

  • @No__t-0 のアイコンハンドルを取得します。Gets an icon handle for the Bitmap.

  • フォームの Form.Icon 属性を、ハンドルから作成されたアイコンに設定します。Sets the Form.Icon attribute of the form to an icon created from the handle.

private:
   [System::Runtime::InteropServices::DllImportAttribute("user32.dll",CharSet=CharSet::Auto)]
   static bool DestroyIcon( IntPtr handle );

private:
   [SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
   void GetHicon_Example( PaintEventArgs^ e )
   {
      
      // Create a Bitmap object from an image file.
      Bitmap^ myBitmap = gcnew Bitmap( "c:\\FakePhoto.jpg" );
      
      // Draw myBitmap to the screen.
      e->Graphics->DrawImage( myBitmap, 0, 0 );
      
      // Get an Hicon for myBitmap.
      IntPtr Hicon = myBitmap->GetHicon();
      
      // Create a new icon from the handle. 
      System::Drawing::Icon^ newIcon = ::Icon::FromHandle( Hicon );
      
      // Set the form Icon attribute to the new icon.
      this->Icon = newIcon;
      
      // You can now destroy the Icon, since the form creates
      // its own copy of the icon accesible through the Form.Icon property.
      DestroyIcon( newIcon->Handle );
   }

[System.Runtime.InteropServices.DllImport("user32.dll", CharSet = CharSet.Auto)]
extern static bool DestroyIcon(IntPtr handle);

private void GetHicon_Example(PaintEventArgs e)
{

    // Create a Bitmap object from an image file.
    Bitmap myBitmap = new Bitmap(@"c:\FakePhoto.jpg");

    // Draw myBitmap to the screen.
    e.Graphics.DrawImage(myBitmap, 0, 0);

    // Get an Hicon for myBitmap.
    IntPtr Hicon = myBitmap.GetHicon();

    // Create a new icon from the handle. 
    Icon newIcon = Icon.FromHandle(Hicon);

    // Set the form Icon attribute to the new icon.
    this.Icon = newIcon;

    // You can now destroy the icon, since the form creates
    // its own copy of the icon accessible through the Form.Icon property.
    DestroyIcon(newIcon.Handle);

}
<System.Runtime.InteropServices.DllImportAttribute("user32.dll")> _
    Private Shared Function DestroyIcon(ByVal handle _ 
    As IntPtr) As Boolean 
    End Function

   Private Sub GetHicon_Example(ByVal e As PaintEventArgs)

        ' Create a Bitmap object from an image file.
        Dim myBitmap As New Bitmap("c:\FakePhoto.jpg")

        ' Draw myBitmap to the screen.
        e.Graphics.DrawImage(myBitmap, 0, 0)

        ' Get an Hicon for myBitmap.
        Dim HIcon As IntPtr = myBitmap.GetHicon()
    
        ' Create a new icon from the handle.
        Dim newIcon As Icon = System.Drawing.Icon.FromHandle(HIcon)

        ' Set the form Icon attribute to the new icon.
        Me.Icon = newIcon

        ' You can now destroy the icon, since the form creates its 
        ' own copy of the icon accessible through the Form.Icon property.
    DestroyIcon(newIcon.Handle)
    End Sub

注釈

初期状態では、ハンドルから作成されたアイコンは元のビットマップと同じサイズになります。Initially, an icon created from the handle will have the same size as the original bitmap.

セキュリティ

SecurityPermission
アンマネージコードを呼び出すための。for calling into unmanaged code. 関連する列挙値: UnmanagedCodeRelated enumeration: UnmanagedCode

適用対象