For every english alphabet you have to map it value e.g.,

A - 1
B - 2
C - 3
.
.
.
Z - 26

You have to create one dialogbox in which 2 edit box will be there. In one edit box we can input text and the other edit box will be read only in which the summation of the alphabets entered in the first edit box will be displayed as soon as we enter an alphabet and the value should be decremented as soon as we delete any alphabet.

Please suggest me how to proceed.

Thanks..