The solution is quite simple and you will be amazed too.
While running the application in the emulator if there is any text entry it will show as below
but for certain forms the icon or the key board wont appear like this.
The solution is quite simple ; while adding a new form in the project by default menu1 will appear i think you would have noticed. At any cost dont delete it. Since it plays a major role in showing the keyboard / keypad where ever the textbox appears in the form.
If you delete it unexpectly, then from the toolbox browse for navigation and place the menu control in the form.Thats enough :-) wallaaa the keyboad appears in the form or in the device !!!!!!.
You can delete the menu control from the form where ever there is no textbox.
I know the solution would not have satisfied you; the same with me too. Still now i am wondereing what is the conenction between the menu control and the windows mobile form.