preventing double application launch

[Put Claude]

Hi,

Can 't find the way preventing a double application launch...
can you help me out...

Great forum guys, never get one like this, all my deep respects...

Put Claude Belgium

[Erel]

The .Net CF does (suppose to) prevent more than single instance.
How do you get more than one instance?

[dzt]

@Erel
I think, he is talking about desktop.

@Put
You can check your Form Title, and if it exists then quit the app.
You can do that using my dzHWdesktop.dll (latest version) posted here Useful Library

Sub Globals
End Sub
 
Sub App_Start
  dzhw.New1

  If dzhw.GetWindowHandle("null", "Form Title") > 0 Then
    AppClose
  End If
  Form1.Show
End Sub

[Put Claude]

Hi,

Yes, did get 2 instance on Acer 300 WM5...
Noticed it when my gps-program counted every 2 seconds, I quit the program and get the underlying second same program that counts now every second, so... for some reason, the system did not prevent a second instance at same time.

dz,
did not find that in helpfile: dzhw.GetWindowHandle("null", "Form Title")

Made a little WF.exe in C (window find) that checks if my application already is open, so yes, bring it to front, and cancel the second launch.
My solution: Start this little exe with the shell function as first line in my application...

Put Claude Belgium