    Get_string is a standard string entery. It has backspace with no cursor
or insert. It is masked and formated. It's parameters are:pointer to string,
a mask string, a format string, X and Y coordenets, Mask strip switch, and
default display switch. The mask string is any ASCII character for and
space for a mask, The format string is made up of spaces where masked and
format characters (see edit_string()) for enteries. Both mask and format
must be concestent for proper fungtion. Error detection is in the debug lib
but masked characters and enteries must match. The srip switch is ON for
stripping the mask form entery and 0 for the masks inclution in entery. The
default display switch is ON or 1 to display what is in the enter string and
OFF or 0 for no display and mask display. The x y coordinet are for display
placement in the current window.
         
Example:

   char name[10];
       
   get_string(name,"         ","uAAAAAAAA",3,3,1,1);

   This call will display the containts of name at coordinates 3, 3, mask
all but alph characters and force an uppre case on the first entery. It will
strip the mask and if any character but backspace is hit first clear name.
It will exit on esc with no data change or return.

   Format characters:                     
                                                   
*  any ascii character                   
A  alphanumaric character                
U  upper case alpha only                 
L  lower case alpha only                 
u  forced upper case alpha               
l  forced lower case alpha               
9  digits 0 - 9 only                                      
#  digits 0 - 9 and -
F  digits 0 - 9, -, . only               
e  digits 0 - 9, -, ., e, E only
h  digits 0 - 9, a,b,c,d,e.f,A,B,C,D,E,F,- only
o  digits 0 - 7,- only
T  t, T, f, F only
Y  y, Y, n, N only
