🚀 go-pugleaf

"Mortz" <rmorteo@hotmail.com> wrote in message
news:404f9b65@newsgroups.borland.com...

> You are right HWND does not change. Therefore, for some
> reason the PID I get from the "CreateProcess" is not directly
> associated with the application's Main Window

Not true.  *All* windows in a program belong to the same PID.  That is not
the issue.  The issue is that you have no control over the order in which
EnumWindows() finds windows.  You have no guarantee that the first window
found for the PID will be the main window.  That's the part that your code
is not taking into account.

> So, what to do?

I  already told you what to do - stop scanning for a new HWND on each
iteration of the thread loop.  Scan *once* and then re-use the same HWND for
all messages.

> Now, if a program can have multiple windows (like word
> documents or IE) how does windows distinguishes among all
> them?

A window is a window regardless.  The OS doesn't care about how many windows
a program has.  It is the program's responsibility to keep track of its own
windows.  Then, if you are looking for a specific window of a specific
program, it is your own reponsibility to make sure that you are working with
the window that you expect to be working with.  There is no straight-forward
way to determine whether a given window is a main window.  A main window a
program-controlled feature, not an OS feature.  You have to figure out the
main window manually.  Have a look at EnumThreadWindows(), GetNextWindow(),
and GetParent() for determing the parent<->child and sibling<->sibling
relationships of all the windows belonging to the program.  Hopefully, the
main window will be the first sibling at the top of the window hierachy (but
that's no guarantee either).

> As an additional comment, I have found that FindExecutable
> also retrieves dll modules in windows XP (like for .bmp files)
> and (as far as I know) CreateProcess cannot use dlls.

It can if you pass the .DLL info to RUNDLL32 or similar app that is designed
for executing DLLs.


Gambit