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KeyPressed

Check if there is a keypress in the keybuffer

Declaration

Source position: crth.inc line 75

  function KeyPressed : Boolean;

Description

Keypressed scans the keyboard buffer and sees if a key has been pressed. If this is the case, True is returned. If not, False is returned. The Shift, Alt, Ctrl keys are not reported. The key is not removed from the buffer, and can hence still be read after the KeyPressed function has been called.

Errors

None.

See also

Name Description
ReadKey Read key from keybuffer

Example

Program Example2;
uses Crt;
{ Program to demonstrate the KeyPressed function. }
begin
  WriteLn('Waiting until a key is pressed');
  repeat
  until KeyPressed;
 { The key is not Read,
   so it should also be outputted at the commandline}
end.