價值不符合dwmapi.dll的預期範圍

當我使用航空玻璃運行我的程序時，出現「價值不符合預期範圍」錯誤。我正在使用dwmapi.dll。這是代碼：價值不符合dwmapi.dll的預期範圍

ON Aero.cs

[StructLayout(LayoutKind.Sequential)] 
    public struct Margins 
    { 
     public int Left; 
     public int Right; 
     public int Top; 
     public int Bottom; 
    } 

    [DllImport("dwmapi.dll", PreserveSig = false)] 
    public static extern void DwmExtendFrameIntoClientArea(IntPtr hwnd, ref Margins margins); 

    [DllImport("dwmapi.dll", PreserveSig = false)] 
    public static extern bool DwmIsCompositionEnabled();

ON AddStudent.cs

private const int PaddingCounter = 0; 
    private Aero.Margins _newMargins; 

    private void SetGlassArea() 
    { 
     if (Aero.DwmIsCompositionEnabled()) 
     { 
      _newMargins.Top = Padding.Top; 
      _newMargins.Bottom = Padding.Bottom; 
      _newMargins.Left = Padding.Left; 
      _newMargins.Right = Padding.Right; 
      Aero.DwmExtendFrameIntoClientArea(this.Handle, ref _newMargins); 
     } 
    } 

    protected override void OnPaintBackground(PaintEventArgs e) 
    { 
     base.OnPaint(e); 
     if (Aero.DwmIsCompositionEnabled()) 
     { 
      e.Graphics.Clear(Color.Black); 
      Rectangle clientArea = new Rectangle(_newMargins.Left, _newMargins.Top, this.ClientRectangle.Width - _newMargins.Left -_newMargins.Right, 
       this.ClientRectangle.Height - _newMargins.Top - _newMargins.Bottom); 
      Brush b = new SolidBrush(this.BackColor); 
      e.Graphics.FillRectangle(b, clientArea); 
     } 
    } 

    public void ApplyGlassSurface() 
    { 
     this.Padding = new Padding(PaddingCounter); 
     SetGlassArea(); 
     Invalidate(); 
    } 

    private void AddStudent_Load(object sender, EventArgs e) 
    { 
     ApplyGlassSurface(); 
     webcam = new FilterInfoCollection(FilterCategory.VideoInputDevice); 
     foreach (FilterInfo videoCaptureDevice in webcam) 
     { 
      comboBoxEx1.Items.Add(videoCaptureDevice.Name); 
     } 
     comboBoxEx1.SelectedIndex = 0; 
    }

錯誤點：

Aero.DwmExtendFrameIntoClientArea(this.Handle, ref _newMargins);

能否請你告訴我什麼是它錯了嗎？我知道它應該工作，因爲我已經看過一個視頻，併爲他工作。謝謝！

來源

2016-06-29 Ibanez1408

你似乎不訴諸文件一併構成該代碼。有很多錯誤。閱讀文檔，然後重試。一個MCVE會很有用。系統告訴你，你的輸入是錯誤的。但是你沒有向我們展示你的意見。而且您不檢查錯誤，因此我無法看到報告的錯誤來自哪裏。我敢打賭，你的真實代碼與你展示的代碼不同。總之這個問題嚴重不足。 –

也許改變DwmExtendFrameIntoClientArea PreserveSig to true。

而變化邊距到：

[StructLayout(LayoutKind.Sequential)] 
public struct Margins 
{ 
    public int leftWidth; 
    public int rightWidth; 
    public int topHeight; 
    public int bottomHeight; 
}

來源

2016-06-29 00:55:38

價值不符合dwmapi.dll的預期範圍

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