Get a value from the user
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 Syntax

        H_GetValue( cString , cType , nLength , cPicture , expDefault )

 Arguments:

      cString    - Description string
      cType      - Type of value to return
      nLength    - Length of value to be entered
      cPicture   - Picture to use for input
      expDefault - Default value

 Returns:

      A value of the given type - If user [Esc]apes from the input, a
      blank value of the appropriate type will be returned

 Description:

      Outputs a box containing the given string, and GETs a value from the
      user of the given type.

 Examples:



 Header File: H_LIB52.CH

 Source: GETVALU.PRG

 Author:  Martin Colloby