Excel File open first then embed in Panel control of windows application.

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C#

Windows

C#4.0

hi,

I'm using below code to bind excel file in panel control but it first open individually then hide and load into panel control. I directly want to open this file in panel how can I do this.

string xlsFileName = @"C:\Exceptions.xlsx";    
    private Excel.Workbook m_workbook;
    const int WM_SYSCOMMAND = 274;
    const int SC_MAXIMIZE = 61488;
    Process proc;

    [DllImport("user32.dll")]
    static extern int SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

    [DllImport("user32.dll")]
    static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

    [DllImport("ole32.dll")]
    static extern int GetRunningObjectTable(uint reserved, out IRunningObjectTable pprot);

    [DllImport("ole32.dll")]
    static extern int CreateBindCtx(uint reserved, out IBindCtx pctx);

private void Form4_Load(object sender, EventArgs e)
    {
      //Run Notepad application inside Panel1 control
      proc = Process.Start(xlsFileName);
      proc.WaitForInputIdle();
      SetParent(proc.MainWindowHandle, this.panel1.Handle);
      SendMessage(proc.MainWindowHandle, WM_SYSCOMMAND, SC_MAXIMIZE, 0);
    }

thanks