Trigger an event on another .NET App

[Dragon]

Hi,

What is the simplest way to implement that ?

Send WM_USER message to main window of second application, and catch it in
it.

The simplest way I can imagine. 8=]

Roman

 

[romy]

Hi

I have two .NET applications that run together on the same local PC.

I have a situation, that when I click a button on the first application, I
need to trigger an event for the second Application.

What is the simplest way to implement that ?

 

[Liddle Feesh]

Hi,

What is the simplest way to implement that ?

Send WM_USER message to main window of second application, and catch it in
it.

The simplest way I can imagine. 8=]

A lot of people do it that way including me, so I've not actually learned
the 'proper' way to do it

If one application calls the other, make the second an ActiveX .EXE and call
that (This is how Microsoft Office products interact).

I'm led to believe by one of my co-workers that the ActiveX EXE can call
each other in .NET without using COM. In other words - one will not have to
be dependant on the stub of the other - but I haven't looked into it. Please
let me know if you find a modern solution to this problem!

BTW: Will "Remoting" solve your problem?

--
Mike Wilson*
Evolved Software Studios Ltd
www.evolvedsoftwarestudios.com

*Ask me about getting YOU a VIDEO of your software being tested in Windows
Vista for ONLY $25

 

[Armin Zingler]

What's WM_USER message?. can you elaborate ?

http://msdn.microsoft.com/library/e...esandmessagequeues.asp?frame=true#app_defined


http://msdn.microsoft.com/library/e.../messagesandmessagequeuesmessages/wm_user.asp



Armin

 

[romy]

What's WM_USER message?. can you elaborate ?

Hi,

What is the simplest way to implement that ?

Send WM_USER message to main window of second application, and catch it in
it.

The simplest way I can imagine. 8=]

Roman

 

[Dragon]

In addition to Armin:

http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface
/windowing/messagesandmessagequeues/messagesandmessagequeuesreference/me
ssagesandmessagequeuesfunctions/sendmessage.asp

http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface
/windowing/messagesandmessagequeues/messagesandmessagequeuesreference/me
ssagesandmessagequeuesfunctions/postmessage.asp

http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface
/windowing/messagesandmessagequeues/messagesandmessagequeuesreference/me
ssagesandmessagequeuesfunctions/sendmessagetimeout.asp

A bit of code:

~
Friend Declare Auto Function SendMessage Lib "user32.dll" ( _
ByVal hwnd As IntPtr, _
ByVal Msg As Int32, _
ByVal wParam As Int32, _
ByVal lParam As Int32 _
) As Int32

Private Const WM_USER As Int32 = &H400

....

' First app
SendMessage(SecondAppProcess.MainWindowHandle, WM_USER, 1, 0)

....

' Second app
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
If m.Msg = WM_USER AndAlso m.WParam.ToInt32 = 1 Then
' Do whatever you want
End If
End Sub
~

HTH

Roman

What's WM_USER message?. can you elaborate ?

Hi,


Send WM_USER message to main window of second application, and catch

it
in

it.

The simplest way I can imagine. 8=]

Roman

 

[Josip Habjan]

Hi,

You can use CreateEvent / SetEvent API functions ..
Give name to this event and you can track it by his name from both of your
applications.

I'm using this API functions in my interprocess communication library:
http://www.habjansoftware.com/ipc_library.aspx

Regards,
Josip Habjan
http://www.habjansoftware.com