URGENT: Problem Sending Windows Message to taskbar icon.

I have a taskbar icon (program) that is supposed to open a form when a user double clicks on a file associate with the program.  I don't want to open a new instance, so in the Main function, I check to see if there is already an instance running, if so, write the filename to registry and tell the existing tray program to open it via SendMessage imported from user32.dll.  The problem is, the taskBar has  form that is run as minimized wtih ShowInTaskBar set to false.  When I set this to true, it accepts the Windows message correctly.  When I set it to false, it does not.  

how can I send a windows message to the application in the tray?  Is it possible?  If not, is there some way I can notify the .exe without have to setup remoting (I don't want to use TCP/IP, so this would be a problem).  

LVL 5
jjacksnAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

_TAD_Commented:


If you are using WIN API then you want to use the Shell_NotifyIcon Function  


here is a page from the MSDN:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/reference/functions/shell_notifyicon.asp
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
_TAD_Commented:


More or less, you need to tell the tray icon to show the window/applicaiton (whether minimized or not is up to you), you then send your window message to the open application like you normally would
0
jjacksnAuthor Commented:
_TAD_

I'm slightly confused.

How do you "Show" something that is minimized.  I don't think the application is listening for Widows Messages.  When the ShowInTaskBar boolena is set to true, everything works like it is supposed to.  I think the form is already running in its minimized state, as I am calling Application.Run on the form...
0
ptmcompCommented:
May be you need a Window Messagequeue to send and receive Messages.
0
jjacksnAuthor Commented:
I got it.

I was using processes to find the process by the same name, then callling process.handle or process.mainWindowHandle (i still think the latter should work)

but doing a simple FindWindow works.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C#

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.