Get Process Window

[nemok]

Hello,

I have a process handle. How can I get a HWND to it's main window?
I couldn't find any function in MSDN that does this.

Thanks

[ovidiucucu]

One soilution can be the following

Use EnumWindows (http://msdn2.microsoft.com/en-us/library/ms633497.aspx) to enumerate the top-level windows.
In EnumWindowsProc (http://msdn2.microsoft.com/en-us/library/ms633498.aspx) callback function call
GetWindowThreadProcessId (http://msdn2.microsoft.com/en-us/library/ms633522.aspx) to "filter" the window created in the given process.


[ Redirected thread ]

[nemok]

So I have to do it backwards from the window to the process...

[ovidiucucu]

Well, I think, there is not a kind of "GetProcessMainWindow" function because in a process can be created zero, one, or many (top-level) windows.
So... which can we say "that's the process main window" :) ;) ?

BTW. How did you get the process handle?

[nemok]

I am using EnumProcesses() to find a specific window.
I know we can't determine the main window. I thinking of something like GetAllProcessWindows()... :D

[TT(n)]

You should be able to do that in the loop.

VB.NET

For Each p as Process In Process.GetProcesses

If p.Handle.ToInt32 = YourPHandle AndAlso p.MainWindowHandle.ToInt32 <> 0 Then
MessageBox.Show(p.MainWindowHandle.ToInt32.ToString)
End If

Next

[golanshahar]

Hello,

I have a process handle. How can I get a HWND to it's main window?
I couldn't find any function in MSDN that does this.

Thanks

Look also at ::GetGUIThreadInfo() (http://msdn2.microsoft.com/en-us/library/ms633506.aspx). ;)

Cheers

[ovidiucucu]

Look also at ::GetGUIThreadInfo() (http://msdn2.microsoft.com/en-us/library/ms633506.aspx). ;)
Does that help more to find out the process main window?
See my previous question (re)mark:
... which can we say "that's the process main window" :) ;) ?

[golanshahar]

Does that help more to find out the process main window?
See my previous question (re)mark:

Your comment is correct we cant, but that API can be an alternative for using ::EnumWindows(), you can get the active/focus window without enum the windows... then ::GetAncestor() can be used on the focus/active window... but no one can guarantee if it will lead to the Main Process window :D, UNLESS Op want to track specific process and not random one, so one look in Spy++ can help him know the windows structure of that specific process.

Cheers