Как добавить значки в верхнюю панель окна (рядом с кнопками максимизации минимума)

Question

Я хочу добавить еще несколько кнопок рядом с кнопками максимизации минимума.

Как я могу достичь этого?

Answer 1

перейдите с WM_NCPAINT, не очень легко, но работает!

Answer 2

Я нашел этот код, чтобы добавить пользовательские кнопки в строке заголовка winform. Это плохо прокомментировано и трудно понять, но попробуйте :)

// The state of our little button 
ButtonState _buttState = ButtonState.Normal; 
Rectangle _buttPosition = new Rectangle(); 

[DllImport("user32.dll")] 
private static extern IntPtr GetWindowDC(IntPtr hWnd); 
[DllImport("user32.dll")] 
private static extern int GetWindowRect(IntPtr hWnd, 
             ref Rectangle lpRect); 
[DllImport("user32.dll")] 
private static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC); 
protected override void WndProc(ref Message m) 
{ 
    int x, y; 
    Rectangle windowRect = new Rectangle(); 
    GetWindowRect(m.HWnd, ref windowRect); 

    switch (m.Msg) 
    { 
     // WM_NCPAINT 
     case 0x85: 
     // WM_PAINT 
     case 0x0A: 
      base.WndProc(ref m); 

      DrawButton(m.HWnd); 

      m.Result = IntPtr.Zero; 

      break; 

     // WM_ACTIVATE 
     case 0x86: 
      base.WndProc(ref m); 
      DrawButton(m.HWnd); 

      break; 

     // WM_NCMOUSEMOVE 
     case 0xA0: 
      // Extract the least significant 16 bits 
      x = ((int)m.LParam << 16) >> 16; 
      // Extract the most significant 16 bits 
      y = (int)m.LParam >> 16; 

      x -= windowRect.Left; 
      y -= windowRect.Top; 

      base.WndProc(ref m); 

      if (!_buttPosition.Contains(new Point(x, y)) && 
       _buttState == ButtonState.Pushed) 
      { 
       _buttState = ButtonState.Normal; 
       DrawButton(m.HWnd); 
      } 

      break; 

     // WM_NCLBUTTONDOWN 
     case 0xA1: 
      // Extract the least significant 16 bits 
      x = ((int)m.LParam << 16) >> 16; 
      // Extract the most significant 16 bits 
      y = (int)m.LParam >> 16; 

      x -= windowRect.Left; 
      y -= windowRect.Top; 

      if (_buttPosition.Contains(new Point(x, y))) 
      { 
       _buttState = ButtonState.Pushed; 
       DrawButton(m.HWnd); 
      } 
      else 
       base.WndProc(ref m); 

      break; 

     // WM_NCLBUTTONUP 
     case 0xA2: 
      // Extract the least significant 16 bits 
      x = ((int)m.LParam << 16) >> 16; 
      // Extract the most significant 16 bits 
      y = (int)m.LParam >> 16; 

      x -= windowRect.Left; 
      y -= windowRect.Top; 

      if (_buttPosition.Contains(new Point(x, y)) && 
       _buttState == ButtonState.Pushed) 
      { 
       _buttState = ButtonState.Normal; 
       // [[TODO]]: Fire a click event for your button 
       //   however you want to do it. 
       DrawButton(m.HWnd); 
      } 
      else 
       base.WndProc(ref m); 

      break; 

     // WM_NCHITTEST 
     case 0x84: 
      // Extract the least significant 16 bits 
      x = ((int)m.LParam << 16) >> 16; 
      // Extract the most significant 16 bits 
      y = (int)m.LParam >> 16; 

      x -= windowRect.Left; 
      y -= windowRect.Top; 

      if (_buttPosition.Contains(new Point(x, y))) 
       m.Result = (IntPtr)18; // HTBORDER 
      else 
       base.WndProc(ref m); 

      break; 

     default: 
      base.WndProc(ref m); 
      break; 
    } 
} 

private void DrawButton(IntPtr hwnd) 
{ 
    IntPtr hDC = GetWindowDC(hwnd); 
    int x, y; 

    using (Graphics g = Graphics.FromHdc(hDC)) 
    { 
     // Work out size and positioning 
     int CaptionHeight = Bounds.Height - ClientRectangle.Height; 
     Size ButtonSize = SystemInformation.CaptionButtonSize; 
     x = Bounds.Width - 4 * ButtonSize.Width; 
     y = (CaptionHeight - ButtonSize.Height)/2; 
     _buttPosition.Location = new Point(x, y); 

     // Work out color 
     Brush color; 
     if (_buttState == ButtonState.Pushed) 
      color = Brushes.LightGreen; 
     else 
      color = Brushes.Red; 

     // Draw our "button" 
     g.FillRectangle(color, x, y, ButtonSize.Width, ButtonSize.Height); 
    } 

    ReleaseDC(hwnd, hDC); 
} 

private void Form1_Load(object sender, EventArgs e) 
{ 
    _buttPosition.Size = SystemInformation.CaptionButtonSize; 
}