Checking for Numlock and Capslock and displaying on Statusbar

Problem/Question/Abstract:

How do I check for a Numlock enabled and Capslock enable?

Answer:

Here are two procedures that you add to the main form of your application:

procedure TfrmMain.CheckCapslock;
begin
  if Odd(Getkeystate(VK_CAPITAL)) then
    Statusline.Panels[1].text := 'CAPS'
  else
    Statusline.Panels[1].text := '';
end;

procedure TfrmMain.CheckNumlock;
begin
  if Odd(Getkeystate(VK_NUMLOCK)) then
    Statusline.Panels[2].text := 'NUM'
  else
    Statusline.Panels[2].text := '';
end;

Add a application component to your project and simply call both these procedures in  the Application.onmessage event i.e.:

procedure TfrmMain.ApplicationEvents1Message(var Msg: tagMSG;
  var Handled: Boolean);
begin
  CheckCapslock;
  CheckNumlock;
end;