VB.Net

        ''' <summary>
        ''' An extension method that replaces the first occurance of a specified string.
        ''' </summary>
        ''' <param name="str"></param>
        ''' <param name="searchTxt"></param>
        ''' <param name="replaceTxt"></param>
        ''' <returns></returns>
        ''' <remarks></remarks>
        <Extension()> _
        Public Function ReplaceFirst(ByVal str As String, searchTxt As String, replaceTxt As String) As String
            Dim pos As Integer = str.IndexOf(searchTxt)

            If pos < 0 Then
                Return str
            End If

            Return str.Substring(0, pos) + replaceTxt + str.Substring(pos + searchTxt.Length)
        End Function

        ''' <summary>
        ''' An extension method that replaces the last occurance of a specified string.
        ''' </summary>
        ''' <param name="str"></param>
        ''' <param name="searchTxt"></param>
        ''' <param name="replaceTxt"></param>
        ''' <returns></returns>
        ''' <remarks></remarks>
        <Extension()> _
        Public Function ReplaceLast(ByVal str As String, searchTxt As String, replaceTxt As String) As String
            Dim pos As Integer = str.LastIndexOf(searchTxt)

            If pos < 0 Then
                Return str
            End If

            Return str.Substring(0, pos) + replaceTxt + str.Substring(pos + searchTxt.Length)
        End Function

C#

        /// <summary>
        /// An extension method that replaces the first occurance of a specified string.
        /// </summary>
        /// <param name="str"></param>
        /// <param name="searchTxt"></param>
        /// <param name="replaceTxt"></param>
        /// <returns></returns>
        /// <remarks></remarks>
        [Extension()]
        public string ReplaceFirst(string str, string searchTxt, string replaceTxt)
        {
            int pos = str.IndexOf(searchTxt);

            if (pos < 0)
            {
                return str;
            }

            return str.Substring(0, pos) + replaceTxt + str.Substring(pos + searchTxt.Length);
        } // end ReplaceFirst

        /// <summary>
        /// An extension method that replaces the last occurance of a specified string.
        /// </summary>
        /// <param name="str"></param>
        /// <param name="searchTxt"></param>
        /// <param name="replaceTxt"></param>
        /// <returns></returns>
        /// <remarks></remarks>
        [Extension()]
        public string ReplaceLast(string str, string searchTxt, string replaceTxt)
        {
            int pos = str.LastIndexOf(searchTxt);

            if (pos < 0)
            {
                return str;
            }

            return str.Substring(0, pos) + replaceTxt + str.Substring(pos + searchTxt.Length);
        } // end ReplaceLast

1. In Outlook, click on the “Calendar Tab” on the left hand side.
2. Under “My Calendars”, right click on the calendar you want to see the permissions for and choose “Properties”.
3. On the “Calendar Properties” dialog, choose the “Permissions” tab.

Here you can view/setup who has access to your calendar and how much access they have.  You can add individuals to have permissions or you can also use groups, say if you wanted to give an entire department permissions.  I’ve included a screenshot below with some of the key areas highlighted in red.

In my case, this error comes about because you have bad JavaScript and/or a JavaScript error is being thrown.  To test, I created a snippet of JavaScript that set the value on an HTML element on the page.  It worked fine.  If I navigate to a page that didn’t have that element and tried to execute it, I would get the above error.  Here was my test code:

Dim buf As String = wv1.InvokeScript("eval", New String() {"document.getElementById(""inputx"").value = '500';"})

• http://www.denalimultimedia.com/info/Articles.aspx?cid=20&topic=IIS-6-ASP-NET-4-0-page-not-found-404

In short for my problem, .Net 2.0 web apps and .Net 4.0 web apps cannot run in the same app pool.  After creating an application pool for the new 4.0 site the problem was gone.  The last thing that Frank mentions is that the Web Services Extension must be set to “Allowed” for the .Net Framework 4.0 (mine was by default).

Unfortunately, the ease of System.Drawing.Bitmap’s GetPixel and SetPixel are gone (for now).  WinRT will not allow you to access that part of the framework (or many other parts of the framework) even if they exist.  Here is my first example on how to fill in a WriteableBitmap with a solid color, pixel by pixel. 

In my example, I’ve created a 128×128 WriteableBitmap.  Then, you have to return the PixelBuffer as a stream, to do so, Import (using in C#) System.Runtime.InteropServices.WindowsRuntime to allow the AsStream() extension to be called.  The other class we’re going to use is Windows.UI.Color (and Windows.UI.Colors) so you may want to include an import to that also.

        Dim bmp As New WriteableBitmap(128, 128)
        Dim stream As Stream = bmp.PixelBuffer.AsStream()
        Dim c As Color = Colors.Red

        For x As Integer = 1 To bmp.PixelWidth
            For y As Integer = 1 To bmp.PixelHeight
                stream.WriteByte(c.B)
                stream.WriteByte(c.G)
                stream.WriteByte(c.R)
                stream.WriteByte(c.A)
            Next
        Next

For each pixel, 4 bytes are written to the stream (Blue, Green, Red, Alpha).  Since this is a stream and not an array that’s 128×128 it’s a little harder to get your head around (my natural instinct is to want to write to pixel 6,4).  Ideally, I want to create something that has the simplicity of System.Drawing.Bitmap.  For now, this is where I’m starting.  Hope this helps sometime.  Below is C# that has been run through a code converter, I haven’t tried to compile it but I thought I’d share it also.

WriteableBitmap bmp = new WriteableBitmap(128, 128);
Stream stream = bmp.PixelBuffer.AsStream();
Color c = Colors.Red;

for (int x = 1; x <= bmp.PixelWidth; x++) {
    for (int y = 1; y <= bmp.PixelHeight; y++) {
        stream.WriteByte(c.B);
        stream.WriteByte(c.G);
        stream.WriteByte(c.R);
        stream.WriteByte(c.A);
    }
}

My next attempt was to re-install Windows.  Upon doing this (and every subsequent time) the OS would crash/lock up after the installation of the VirtualBox Guest Additions.  The screen would go to the default color for Metro and nothing else would display.  The only fix I found that has worked is to fully repair the OS (which is pretty much a re-install considering I have nothing else on the VM anyway).  I should note, I did have the guest additions installed a few weeks ago so I don’t know if a recent update has caused new issues that didn’t occur before or not.  The end result is, I cannot get Windows 8 functioning in a way that I can develop Metro apps with it (e.g. with Visual Studio 11).

On an up note, the WinForms editor seems to work as trusty as ever.  There is something to be said for software that works (and works well).  There’s also something to be said about software that doesn’t work well (*cough*, the XAML designer…. “Designer process terminated unexpectedly!”). 

VB.Net

Page.Validate

If Page.IsValid = True Then
   Page.ClientScript.RegisterClientScriptBlock(Me.GetType, "script", js, True)
End If

C#

Page.Validate();

if (Page.IsValid)
{
   Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "script", js, true);
}

=IF(B1-A1 >= 0, B1-A1, 0)

The above assumes your values are in cells A1 and B1.  Below is just an example of what it would look like on a sheet.