QGET_STRING

     To get a string from the keyboard without echoing it to the screen.

     string = QGET_STRING()

     None.

     string   The string read from the keyboard.

     A string variable is created and filled.

     The IDL GET_KBRD functions is used to get each character in
     the string.  Each character is added to the string until a
     carriage return is struck.  The carriage return is not appended
     to the string.  Striking the delete key or the backspace key
     removes the previous character from the string (only the backspace
     key will work in VMS IDL).

     For a widget password procedure see
     http://www.dfanning.com/tip_examples/password.pro

     Written by Michael R. Greason, STX, 8 January 1991.
     Work for Mac and Windows IDL  W. Landsman    September 1995
     Converted to IDL V5.0   W. Landsman   September 1997

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