Username:
<com:TTextBox ID="Login"
              ValidationGroup="SignupGroup" />
<com:TRequiredFieldValidator
    ControlToValidate="Login"
    Display="Dynamic"
    ErrorMessage="Username cannot be empty"
    ValidationGroup="SignupGroup" />
<com:TRegularExpressionValidator
    ControlToValidate="Login"
    RegularExpression="[a-zA-Z0-9_]{6,255}"
    Display="Dynamic"
    ErrorMessage="Username must contain 6-255 characters, all Latin alphanumeric or underscore"
    ValidationGroup="SignupGroup" />
<com:TCustomValidator
    ControlToValidate="Login"
    OnServerValidate="checkUsername"
    Display="Dynamic"
    ErrorMessage="Username already exists"
    ValidationGroup="SignupGroup" />
<br />
Password:
<com:TTextBox ID="Password"
              TextMode="Password"
              ValidationGroup="SignupGroup" />
<com:TRequiredFieldValidator
    ControlToValidate="Password"
    Display="Dynamic"
    ErrorMessage="Password cannot be empty"
    ValidationGroup="SignupGroup" />
<br />
Repeat password:
<com:TTextBox ID="RePassword"
              TextMode="Password"
              ValidationGroup="SignupGroup" />
<com:TRequiredFieldValidator
    ControlToValidate="RePassword"
    Display="Dynamic"
    ErrorMessage="Password cannot be empty"
    ValidationGroup="SignupGroup" />
<com:TCompareValidator
    ControlToValidate="RePassword"
    ControlToCompare="Password"
    DataType="String"
    Operator="Equal"
    Display="Dynamic"
    ErrorMessage="Passwords don't match"
    ValidationGroup="SignupGroup" />
<br />
Admin:
<com:TCheckBox ID="Admin"
               ValidationGroup="SignupGroup" />
<br />
<com:TButton
    Text="Create"
    OnCommand="registerUser"
    ValidationGroup="SignupGroup" />
<com:TValidationSummary
    ValidationGroup="SignupGroup" />