Article #17064: adding system menu items to a form

 Question and Answer Database
FAQ2064D.txt adding system menu items to a form
Category :Windows API
Platform :All
Product :All 32 bit
Question:
How do I add a custom item to the system menu of my application?
Answer:
The following example demonstrates using the Windows API
function AppendMenu() to append a new menu item to the system
menu. We will define a new system command
constant : SC_MyMenuItem that will be used to identify our
new item to the system. After adding the menu item, we will
trap the WM_SYSCOMMAND message to test if our new menu item was
selected.
Example:
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
procedure WMSysCommand(var Msg: TWMSysCommand);
message WM_SYSCOMMAND;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
const
SC_MyMenuItem = WM_USER + 1;
procedure TForm1.FormCreate(Sender: TObject);
begin
AppendMenu(GetSystemMenu(Handle, FALSE), MF_SEPARATOR, 0, '');
AppendMenu(GetSystemMenu(Handle, FALSE),
MF_STRING,
SC_MyMenuItem,
'My Menu Item');
end;
procedure TForm1.WMSysCommand(var Msg: TWMSysCommand);
begin
if Msg.CmdType = SC_MyMenuItem then
ShowMessage('Got the message') else
inherited;
end;
7/16/98 4:31:28 PM

Last Modified: 01-SEP-99