invisible c# windows application

[christopher green]

I am writing a C# windows application but I don't want to display any
forms, effectively I want it to be invisible on the desktop apart from
an icon in the system tray. How can I do this? I know I can start an
application minimised but I don't want to display any forms.

Thanks for your assistance.

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[Scott B \(Was New Guy\)]

A) Don't create any forms
B) If for some reason you have to, then use form.Hide();

"christophe r green" <us************ @yahoo.com> wrote in message
news:eB******** ******@TK2MSFTN GP10.phx.gbl...

I am writing a C# windows application but I don't want to display any
forms, effectively I want it to be invisible on the desktop apart from
an icon in the system tray. How can I do this? I know I can start an
application minimised but I don't want to display any forms.

Thanks for your assistance.

*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!

[Jon Skeet [C# MVP]]

christopher green <us************ @yahoo.com> wrote:

I am writing a C# windows application but I don't want to display any
forms, effectively I want it to be invisible on the desktop apart from
an icon in the system tray. How can I do this? I know I can start an
application minimised but I don't want to display any forms.

Just don't create any forms then. There's nothing forcing you to.

I don't know offhand how you put an icon in the system tray, but I'm
sure there's code around the net to help you with that part.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Mark Rae]

"christophe r green" <us************ @yahoo.com> wrote in message
news:eB******** ******@TK2MSFTN GP10.phx.gbl...

I am writing a C# windows application but I don't want to display any
forms, effectively I want it to be invisible on the desktop apart from
an icon in the system tray. How can I do this? I know I can start an
application minimised but I don't want to display any forms.

A WinForms app doesn't *have* to have any forms in it - it's not
compulsory.. :-)

[Ignacio Machin \( .NET/ C# MVP \)]

Hi

This is the code I'm using to do that, I saw a post today that do not
require P/invoke but I havent test it yet

using System.Runtime. InteropServices ;

[DllImport("user 32.dll",EntryPo int="SetForegro undWindow")]
public static extern bool SetForegroundWi ndow(IntPtr hWnd);
[DllImport("user 32.dll")]
private static extern bool MessageBeep(int type);
[DllImport("user 32.dll")]
public static extern int SetWindowLong( IntPtr window, int index, int
value);
[DllImport("user 32.dll")]
public static extern int GetWindowLong( IntPtr window, int index);
[DllImport("winm m.dll")]
public static extern int sndPlaySound(st ring lpszSoundName , int uFlags)
;
const int GWL_EXSTYLE = -20;
const int WS_EX_TOOLWINDO W = 0x00000080;
const int WS_EX_APPWINDOW = 0x00040000;

//This is the icon when there are no orders in the system
Icon normalIcon;
public Form1()
{
this.notifyIcon 1 = new System.Windows. Forms.NotifyIco n(this.componen ts);

// The Icon property sets the icon that will appear
// in the systray for this application.
notifyIcon1.Ico n = normalIcon;

// The ContextMenu property sets the menu that will
// appear when the systray icon is right clicked.
notifyIcon1.Con textMenu = this.contextMen u1;

// The Text property sets the text that will be displayed,
// in a tooltip, when the mouse hovers over the systray icon.
notifyIcon1.Tex t = "the text";
notifyIcon1.Vis ible = true;
//Remove from the taskbar and also from alt+tab
this.WindowStat e = System.Windows. Forms.FormWindo wState.Minimize d;
this.Visible = false;
this.ShowInTask bar = false;

int windowStyle = GetWindowLong(H andle, GWL_EXSTYLE);
SetWindowLong(H andle, GWL_EXSTYLE, windowStyle | WS_EX_TOOLWINDO W);
}
Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

[Jochen Kalmbach]

Ignacio Machin ( .NET/ C# MVP ) wrote:

Hi

This is the code I'm using to do that, I saw a post today that do not
require P/invoke but I havent test it yet

using System.Runtime. InteropServices ;

[DllImport("user 32.dll",EntryPo int="SetForegro undWindow")]
public static extern bool SetForegroundWi ndow(IntPtr hWnd);
[DllImport("user 32.dll")]
private static extern bool MessageBeep(int type);
[DllImport("user 32.dll")]
public static extern int SetWindowLong( IntPtr window, int index,
int
value);
public static extern int GetWindowLong( IntPtr window, int index);
[DllImport("winm m.dll")]
public static extern int sndPlaySound(st ring lpszSoundName , int
uFlags)

I suggest also to the the "System.Securit y.SupressUnmana gedCodeSecurity "
for better performance.

So change the attributes to:
[DllImport("xxx. dll"), System.Security .SupressUnmanag edCodeSecurity]
--
Greetings
Jochen

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