Findwindow Sendmessage Help

Hello all.

Ok im making a macro program...

I got this...

Code:

---

#include <windows.h>

int main(void)
{
        int i;
        char test;
        HWND hwndEdit = 0;
        HWND hwnd = 0;
        i = 0;
        //Get main notepad handle
        while(hwnd==0)
                hwnd = FindWindow("Notepad","a - Notepad");

        while(hwndEdit==0)
                hwndEdit = FindWindowEx(hwnd,0,"Edit",0);

        //write an 'a'
       
        test = 97;

        for(i=0;i<10;i++)
        SendMessage(hwnd,WM_CHAR,test,0);

        return 0;
}

---

All that I want to do, is send a message to the notepad and display 'a' 10 times to it while its up.

I used spy++ to check if the handles were right for each window and everything checked out OK in debugger.

Does anyone notice whats wrong with this?

I GOT IT


I LEFT SENDMESSAGE AS HWND AND DINT CHANGE IT TO HWNDEDIT!!!!

Hmm, this program doesnt take in the enter key for some reason.

I sent it (ASCII 13) but it doesnt respond to it.

does anyone know how to send the F1-F12 keys using SendMessage ?

Have you tried sending a WM_KEYDOWN message?

You can send F1 - F12 as virtual keys.

Yeah I tried WM_KEYDOWN.

Is it possiable a program can block incoming enter keys?

Before i test something, I test it in notepad and it works fine.

For some reason the program just doesnt let me send the enter key to execute a chat.

Example. I send aaaaa then the enter key then aaaaa.

In notepad it looks like this.

aaaaaa
aaaaaa

In the program it just goes aaaaaaaaaaaa so it ignores the enter key...

im actually using 13 carraige return but im guessing thats the enter key.
Coder

An enter in windows equals carriage return followed by newline.
ie. crlf = "\r\n"
printf, etc convers \n to the return character(s) for the operating system.

You should also be aware that some applications react to the WM_KEYUP rather than down. It will do no harm to send both since that is what a user would do.

i have sent it

SendMessage(hwnd,WM_CHAR,13,0);
SendMessage(hwnd,WM_KEYDOWN,VK_RETURN,0);
SendMessage(hwnd,WM_KEYUP,VK_RETURN,0);
SendMessage(hwnd,WM_KEYUP,13,0);
SendMessage(hwnd,WM_KEYDOWN,13,0);
SendMessage(hwnd,WM_CHAR,'\r\n',0);
SendMessage(hwnd,WM_CHAR,'\r',0);
SendMessage(hwnd,WM_CHAR,'\n',0);
SendMessage(hwnd,WM_CHAR,VK_RETURN,0);
SendMessage(hwnd,WM_KEYDOWN,'\r\n',0);
SendMessage(hwnd,WM_KEYUP,'\r\n',0);
SendMessage(hwnd,WM_KEYDOWN,'\n',0);
SendMessage(hwnd,WM_KEYUP,'\n',0);
SendMessage(hwnd,WM_KEYDOWN,'\r\n',0);
SendMessage(hwnd,WM_KEYUP,'\r\n',0);


all of those, and still no enter key is being pressed.

I can send characters to it, but it wont execute the enter key.

Sending more than one character in keyup/keydown/etc is a bad idea as the function will ignore both (it only supports one keypress at a time, so will take your doubles as an invalid key and ignore).

How do i make a program think that the enter key has been pressed?

Try this:

Code:

---

SendMessage(hwnd,WM_CHAR,'\r',0);
SendMessage(hwnd,WM_CHAR,'\n',0);

---

Hmm

Is it possiable that a program has blocked out keys that are sent in.

Example.

I can send in any key and it will be put on the chat bar. most ANSI keys. For some reason if I make a key like 'a' a macro that performs a task it does nothing when i send it with sendmessage.
I know its sending in the key 'a' i see it in the chat bar but it does no actions.

Does anyone know how I make sure that the program thinks a key was pressed?

Try this:

keybd_event(VK_RETURN, 0, KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_RETURN, 0, KEYEVENTF_KEYUP, 0);

With that, the window has to be ontop, is there anyway I can send that and the window not be ontop?

In these circumstances, I'd load the application your trying to control into a debugger, fake the window message and watch what happens to it, and then do a real keypress and watch. You should then be able to tell what you need to do in order to "fool" the program into accepting the keypress.

If it's a chat-type program, then it most likely will ignore all ascii and virtual keys, and use the scancode instead, asking the system to translate the key for it, to maintain compatibility. This is certainly the way I'd do it.

scancode?

Is this a hex or decimal?

How big can a scancode be?

I reason I ask is, im 99% sure u can run this program in debugger mode, because you have to open a diffrent program that links to the main program in runtime. YOu cant jump to the other program because it sends information to the main client.

So, if I can figure out how to send a scancode, then ill just make a big for loop that sends everynumber in its MAX size to the client until it says something :/.

Is this possiable?

How does one send a scancode?

The hardware scan code is an 8bit value. There is a program that will return the scan code of a key at the bottom of part 6 of my tutorial here.

bits 16-23 of WM_CHAR's lparam is the scan code.

So

WM_CHAR

WPARAM wParam
LPARAM lParam;

takes in that.

My scancode value for Enter is '1c' or '28'

and my Lparm can be anything between 16-28 depending on my OEM.
Im guessing my OEM code is '437'.

so what is my wParm.

in

Code:

---

wParm = 0x1c;  //Scancode value for 'Enter Key'
for(i=16;i<29;i++)
SendMessage(hwnd,WM_CHAR,wParm,i);

---

Then I tryed

Code:

---

wParm = 97;
for(i=16;i<29;i++)
SendMessage(hwnd,WM_CHAR,wParm,i);

---

Then I realized its still taking the ANSI value for the wParm.
and it still printed out the aaaaaaaaa in the chat bar.

How do I send the scancode value?

Update I just send this and still nothing.

Code:

---

for(i=16;i<29;i++)
            for(z=0;z<300;z++)
                SendMessage(hwnd,WM_CHAR,z,i);

---

Did you use Elixia's method yet? What I would do is get into Spy++, and intercept all messages to the control. Press the enter key, and then with you program just mimic the same messages.

I used the technique, and got the following:

WM_KEYDOWN, nVirtKey=VK_RETURN, ScanCode=1C
WM_CHAR chCharCode=13, ScanCode=1C
WM_KEYUP, nVirtKey=VK_RETURN, ScanCode=1C

There was also some other variables for each message, but you can find those out yourself. So basically, you should just send the messages exactly as listed in a program like Spy++.

I guess I should have said something when I didnt know how to use the message getter in Spy++. I had the wrong version, so I did a search and found the right one...

So I got this.

http://www.battleoftheoutlaws.com/images/OUTPUT.gif


It might be hard to read, im a new user with Spy++ and have figured out how to filter out all the crap (i got rid of some mouse stuff ect.)

Now with my ability I duplicated the message like this.

Code:

---

#include <windows.h>
#include <stdio.h>
int main(void)
{       
       
        HWND hwnd = 0;
       
        //Get main notepad handle
        while(hwnd==0)
                hwnd = FindWindow("SwgClient",NULL);


SendMessage(hwnd,WM_KEYDOWN,'A',0);
SendMessage(hwnd,WM_CHAR,'A',0);
SendMessage(hwnd,WM_KEYUP,'A',0);

SendMessage(hwnd,WM_KEYDOWN,VK_RETURN,0);
SendMessage(hwnd,WM_CHAR,13,0);
SendMessage(hwnd,WM_KEYUP,VK_RETURN,0);

SendMessage(hwnd,WM_KEYDOWN,'B',0);
SendMessage(hwnd,WM_CHAR,'B',0);
SendMessage(hwnd,WM_KEYUP,'B',0);

SendMessage(hwnd,WM_KEYDOWN,VK_RETURN,0);
SendMessage(hwnd,WM_CHAR,13,0);
SendMessage(hwnd,WM_KEYUP,VK_RETURN,0);

SendMessage(hwnd,WM_KEYDOWN,'C',0);
SendMessage(hwnd,WM_CHAR,'C',0);
SendMessage(hwnd,WM_KEYUP,'C',0);

SendMessage(hwnd,WM_KEYDOWN,VK_RETURN,0);
SendMessage(hwnd,WM_CHAR,13,0);
SendMessage(hwnd,WM_KEYUP,VK_RETURN,0);

SendMessage(hwnd,WM_KEYDOWN,'D',0);
SendMessage(hwnd,WM_CHAR,'D',0);
SendMessage(hwnd,WM_KEYUP,'D',0);

SendMessage(hwnd,WM_KEYDOWN,VK_RETURN,0);
SendMessage(hwnd,WM_CHAR,13,0);
SendMessage(hwnd,WM_KEYUP,VK_RETURN,0);

SendMessage(hwnd,WM_SYSKEYDOWN,VK_MENU,0);

SendMessage(hwnd,WM_CANCELMODE,0,0);
SendMessage(hwnd,WM_CANCELMODE,0,0);

SendMessage(hwnd,WM_KEYUP,VK_MENU,0);       

        return 0;
}

---

Now when this runs. It prints out in the chat box.

"ABCD"

no return key was pushed? I also see a lot of extra stuff in the output of the message. Could someone tell me what im missing.


Coder87

Has it occured to you that the author of the target program may well be looking for certain "key presses" and treating them in HIS windows loop in a particular way?

You are still only sending half a keystroke, as you are sending lparam as 0 (which contains the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag). The program may well be noticing this and therefore completely ignoring your message.

Code:

---

SendMessage(hwnd,WM_KEYDOWN,0x00000041,0x001E0001);
SendMessage(hwnd,WM_CHAR,0x00000041,0x001E0001);
SendMessage(hwnd,WM_KEYUP,0x00000041,0xc01E0001);

SendMessage(hwnd,WM_KEYDOWN,0x0000000d,0x001c0001);
SendMessage(hwnd,WM_CHAR,0x0000000d,0x001c0001);
SendMessage(hwnd,WM_KEYUP,0x0000000d,0xc01c0001);

---

Is there a way to trick a system in thinking the key was pressed even thought it is looking for it?

It prints the letters in the Box, but still isnt executing command buttons like Enter.

Is this a lose cause?

Try to find a keyboard macro recorder, and see how it works, and if it does the return key for you.