WPF: How to merge multiple columns in grid ?

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Disable close button on form - C#

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In one of my projects, I had to implement a form with Close[X] button Hide, so that the user cannot leave the form until it finishes the data processing. From the form designer window in VS.Net 2005, it is possible to hide the Minimize box and Maximize box. But there is no property called Close or CloseBox. Then I had tried with by setting form property ControlBox = false . With this i am able to achieve hiding the Close/Minimize/Maximize buttons. But at the same time there is a side effect.i.e., Form icon(which is generally displayed on form title bar)  also hidden.  So after little bit investigation came up with the following hack to get,  i)  disable the close button  ii) displaying the form icon To achieve this, we have to override CreateParams property of Form base class as follows, Code: private const int CP_DISABLE_CLOSE_BUTTON = 0x200; protected override CreateParams CreateParams { get ...
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Convert typed library (.tlb) to .net assembly?

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Sometimes we have to use the legacy code(C, C++) in .Net projects which is provided by third party vendors. Most of the times these guys will provide, equivalent .net framework typed library (.tlb) of that legacy code. Then, how to refer those in our .net projects and make use of functionality provided by it?   Follow the below steps, Keep ".tlb" file which is nothing but legacy typed library Open windows command prompt Go to directory, " C:\Program Files (x86)\Microsoft Visual Studio 8\SDK\v2.0\Bin " or     "C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin". It depends on which version of visual studio you had. Enter the following and execute, TlbImp.exe "E\MyLibrary.tlb" . Here, replace "E:\MyLibrary.tlb" with path to your tlb file. It will import the .net framework type library to assembly.i.e, .dll and it can be found at path "C:\Program Files (x86)\Microsoft Visual Studio 8\SDK\v2.0\Bin" with name ...
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Routed Events in WPF

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Routed events are events which navigate up or down the visual tree acording to their RoutingStrategy. The routing strategy can be bubbling, tunneling or direct. You can hook up event handlers on the element that raises the event or also on other elements above or below it by using the attached event syntax: Button.Click="Button_Click" . Routed events normally appear as pair. The first is a tunneling event called PreviewMouseDown and the second is the bubbling called MouseDown . They don't stop routing if they reach an event handler. To stop routing then we have to set e.Handled = true; . Routed events are very similar to dependency properties (though instead of the Property suffix, by convention, we use an Event suffix… though it is not required).  Also need to register a RoutedEvent in the static constructor, followed by a standard .NET event wrapper.  Same as for dependency properties, DO NOT put any logic in the event wrapper itself. Routi...
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