Getting the handle of a window?

Henrik · Post by **Henrik** » Wed Apr 28, 2004 9:39 pm

Hi Go for the EXE name
Like this for "PUREBASIC.EXE"

Structure PROCESSENTRY32
dwSize.l
cntUsage.l
th32ProcessID.l
th32DefaultHeapID.l
th32ModuleID.l
cntThreads.l
th32ParentProcessID.l
pcPriClassBase.l
dwFlags.l
szExeFile.b[#MAX_PATH]
EndStructure


#TH32CS_SNAPPROCESS = $2
#PROCESS_ALL_ACCESS=$FFF
;-Procedure List



    If OpenLibrary(0, "Kernel32.dll")
        
        CreateToolhelpSnapshot = IsFunction(0, "CreateToolhelp32Snapshot")
        ProcessFirst           = IsFunction(0, "Process32First")
        ProcessNext            = IsFunction(0, "Process32Next")
        
        If CreateToolhelpSnapshot And ProcessFirst And ProcessNext           
            Process.PROCESSENTRY32\dwSize = SizeOf(PROCESSENTRY32)
            
            Snapshot = CallFunctionFast(CreateToolhelpSnapshot, #TH32CS_SNAPPROCESS, 0)
            If Snapshot
                
                ProcessFound = CallFunctionFast(ProcessFirst, Snapshot, Process)
                While ProcessFound
                    If GetFilePart(PeekS(@Process\szExeFile)) ="PUREBASIC.EXE"
                     Check =PeekL(@Process\th32ProcessID)
                     Break
                     EndIf 
                    ProcessFound = CallFunctionFast(ProcessNext, Snapshot, Process)
                    
                Wend
            EndIf
            
            CloseHandle_(Snapshot)
        EndIf
        
        CloseLibrary(0)
    EndIf
    



    Repeat
        hwin=FindWindow_(0,0)
        
        While hwin<>0 ;And oldwin <>win
        MemID= AllocateMemory (255)
            GetWindowText_ (hwin, MemID, 255)
            title$ = PeekS (MemID)
            
           GetWindowThreadProcessId_(hwin,@ProcessId.l)

            If Check= ProcessId
            
            Debug "ProcessID =: "+StrU(ProcessId,#Long)
            ;  Debug title$
            Break
            
            EndIf
            hwin=GetWindow_(hwin,#GW_HWNDNEXT)
        Wend
        Until hwin
    
    
    
Debug "WindHandler =: "+Str(hwin)

Edit .. ups abit late

Best regards
Henrik

dagcrack · Post by **dagcrack** » Wed Apr 28, 2004 9:45 pm

Henrick, your code seems a little better for what I need, but im getting an error when compiling at line 57

MemID= AllocateMemory (255)

needs another parameter tho.. isnt 255 the size? then whats the #mem?!

Henrik · Post by **Henrik** » Wed Apr 28, 2004 9:49 pm

iy's compiled with 3.90

Code: Select all

MemID= AllocateMemory (255)
GetWindowText_ (hwin, MemID, 255)
title$ = PeekS (MemID)

with 3.81 use

Code: Select all

GetWindowText_ (hwin, AllocateMemory (0, 255), 255)
title$ = PeekS (MemoryID ())

Best regards
Henrik

dagcrack · Post by **dagcrack** » Wed Apr 28, 2004 10:09 pm

Compiles now.. heh I still dont installed 3.90 as I think that many libs wont work fine (im wrong maybe?).. anyway I changed the exe name at your code and compiled in debug mode..

I got this:

ProcessID = 2092
WindHandler = 166724300

(from winamp.exe)

but those doesnt seem to be real.

Henrik · Post by **Henrik** » Wed Apr 28, 2004 10:36 pm

8O very odd ProcessID & Handler you got there

ProcessId seems way to smal and handler too big, dont get it ?
I don't have winamp so i cant test it for you

Pleas try it with the fweil's example, what handler dit it return ?

Edit: Oh BTW i'am running a win98, duno if it workes on NT, 2000 and Xp ?

Best Regards
Henrik

Henrik · Post by **Henrik** » Wed Apr 28, 2004 10:39 pm

dagcrack could you hand me a link to your ver. of winamp ?

fweil · Post by **fweil** » Wed Apr 28, 2004 10:40 pm

Processes numbers generated by the OS are low numbers from 0 to xxxx usually, but handles and DCs are higher values (32 bits range). This is the way Windows does for allocating unique numbers to such object's levels.

AFAIK handles start at $10000, below are processes.

Let me know if one has more information about.

Henrik · Post by **Henrik** » Wed Apr 28, 2004 11:04 pm

@fweil
not on win98

I just tested it aganst another program hwo shows the handler:
with both i thied to find "Windows commander 50"
Shatter shows that the handlre is:
Hex $874 , dec 2164

my code showes only the one i posted shows

ProcessID =: 4294328589
Windows Commander 5.0
WindHandler =: 2164

dagcrack · Post by **dagcrack** » Wed Apr 28, 2004 11:04 pm

hm I dunno if I'll find 2.91 download or installer on my machine.. i could host you my winamp dir but maybe winamp installs some dll to the windows dir ( ? ).. anyway I hosted it on a friend's ISP account

http://users.skynet.be/fa297478/Winamp.zip

Henrik · Post by **Henrik** » Wed Apr 28, 2004 11:10 pm

i just found something "VERY" -very- odd
If i run my code first i have no prob. by finding wincmds handler
But if i have startet "Shatter" AND then run my code i get a comlpetly wrong handler
When i close the Shatter and run my code again it okay again.

Edit/ but the processID is alwayes correct.
Maybe you should try GetDesktopWindow_() insted of FindWindow_()

Dont get it ?

Best regrads
henrik

NoahPhense · Post by **NoahPhense** » Wed Apr 28, 2004 11:17 pm

fweil wrote:...,

want to learn more about windows and how to get handles and other information ?

Play first with the following code and launch Winamp. Then come back with more questions if required ....
Code: Select all
#GWW_HINSTANCE = -6

[edited]

WOW.. VERY nice. ...

- np

Henrik · Post by **Henrik** » Wed Apr 28, 2004 11:34 pm

@dagcrack
i installed winamp and checked it with Shatter
The handler was:
Hex $ cd0 : Dec 3280

i tried the "CloseWindow_(3280) and it worked as you said.
Then i tried my code and the debugger was:

ProcessID =: 4294189209
Winamp Playlist Editor
WindHandler =: 3360

The window you see is not the main window but a child window ..
you have to go trough it's childs to get it

That one thing we learned another is that win98 shows difrent processID and handler from ex. XP

But i have to go to bed now i try tomorrow after work to find the window
But look at some snippers "CodeArchiv" about tasks, as far as i remember there is some about getting childswindows/process.
Zzzz..

Best Regards
Henrik

dagcrack · Post by **dagcrack** » Wed Apr 28, 2004 11:56 pm

Thx Henrik, i'll be looking at the codearchiv. I thougt about looking at it anyway. (got it at my hdd, is always useful when learning something new, dunno if theres a newer version of the codearchiv?!).

I'll be modelling some tanks for my game too.. as I can't stop everything for this damn winamp handle

.. But i'll finding out how to get it on every OS later.

Henrik · Post by **Henrik** » Thu Apr 29, 2004 9:18 pm

@dagcrack
Lol it was kind off easy in the end.
I don't have much time so i make it short.

I found it, its' a skinwinchild of winamp.exe
the name off the window is "Winamp 2.91", you can't see the Window's title bar, -skinwin you know- .

Try this code and see if it finds the window and close it.
It workes here on win98 se

Code: Select all

Repeat
    hwin=FindWindow_(0,0)
    
    While hwin<>0 ;And oldwin <>win
        
        MemID= AllocateMemory (255)
        GetWindowText_ (hwin, MemID, 255)
        Wintitle$ = PeekS (MemID)
        
        Debug Wintitle$
        GetWindowThreadProcessId_(hwin,@ProcessId.l)
        If Wintitle$ = "Winamp 2.91"
        Debug "Winamp 2.91' processID : " +StrU(ProcessId,#Long)
        break
        EndIf
        hwin=GetWindow_(hwin,#GW_HWNDNEXT)
    Wend
Until hwin



Debug "WindHandler =: "+Str(hwin)
Debug " "
Debug " Wait 4 sec."
Debug " And I do a CloseWindow_(hwin) on Winamp"

Delay (4000)
CloseWindow_(hwin)

Best regrads
Henrik

dagcrack · Post by **dagcrack** » Thu Apr 29, 2004 11:09 pm

Weird.. debugs a whole list non-stop... gotta check the source.