Soft keyboard capital initially

I want that when a user taps on a TextBox the keyboard should be capital initially and then small case after entering first character.

I have seen this in calendar app. When you tap on Add title the shift key is initially on and when you tap on Add a message it's off
Here are the screen shots..

Screen shot #1

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Screen shot #2

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Solution

Here is a quick summary of the different InputScope types you can set for the on-screen keyboad. http://msdn.microsoft.com/en-us/library/windowsphone/develop/hh393998(v=vs.105).aspx

It sounds like "Text" worked for you, but "Chat" will also begin with a capital. The difference is that "Chat" does not auto-correct.