CODEWITHSUNDEEP
delphi-xe2
jmontegrosso
jmontegrosso

Reputation: 99

how do I intercept was pressed the F1 key on my main window?

How to do that when I'm in the main window of my system by pressing F1 will display the help muetre in pdf format. how do I intercept was pressed the F1 key on my main window?

I use Delphi XE2

Thanks for the help!

Upvotes: 1

Views: 630

Answers (1)

Ken White
Ken White

Reputation: 125669

Use the Application.OnHelpCommand event, which you can either assign in code:

interface

type
  TForm1 = class(TForm)
     // IDE generated code
  private
    procedure AppOnHelp(Command: Word; Data: Integer; 
      var CallHelp: Boolean);
  end;

implementation

procedure TForm1.FormCreate(Sender: TObject);
begin
  Application.OnHelp := AppOnHelp;
end;

Or assign by using a TApplicationEvents component and creating a handler for the OnHelp event in the Object Inspector's Events tab.

You can set CallHelp to false to prevent the normal help processing, and launch your own help file via ShellExecute.

procedure TForm1.AppOnHelp(Command: Word; Data: Integer; 
      var CallHelp: Boolean);
begin
  CallHelp := False;
  // Launch your own help here
end;

Upvotes: 1

Related Questions