Get Hwnd by filename?

Is there a set of API's I can use where I can specify the name of the executable (say "C:\Program Files\MyApp.exe"), and retrieve handles to a window of that app?

Maybe I should better explain what I'm looking for.

The program C:\MyApp.exe is going to be running, but hidden with a icon in the systray.

I want my other program to be able to signal to the running instance of MyApp.exe that it should show itself.

Is there a way to do this when I only know the path to the file?

I know FindExecutable returns a handle to a file but I don't know if that's useful..

Try the FindExecutable API.

http://www.allapi.net/apilist/FindExecutable.shtml

Right, but what can I do with that handle that's returned?

Try this:

VB Code:

Private Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
 
Private Const SW_SHOWNORMAL = 1
 
'usage
ShowWindow HandleOfFile&, SW_SHOWNORMAL