C / C++ / MFC

6-Jul-06 0:02

How do I send keys to application?

I tried like
::SendMessage(hwnd,WM_CHAR,(WPARM)VK_KEY,NULL)
But it's not right I guess.. please help me.

NULL

Justin Tay6-Jul-06 0:05

Justin Tay

6-Jul-06 0:05

SendInput. The window must have focus.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/sendinput.asp[^]

Smith#6-Jul-06 0:17

Re: Sending keys [modified]

6-Jul-06 0:17

sendInput doesn't take Hwnd as a param so is it not possible to specify the window? and hence you said "The window must have focus" ?

NULL

Justin Tay6-Jul-06 0:46

Justin Tay

6-Jul-06 0:46

Yes it's not possible to specify a window as it's simulating keys at the lowest level. You would have to set the window as the foreground window.

Raymond talks about this. You can also read the comments for more good info.

http://blogs.msdn.com/oldnewthing/archive/2005/05/30/423202.aspx[^]

Using PostMessage with WM_KEYDOWN / WM_KEYUP / WM_SYSKEYDOWN / WM_SYSKEYUP (WM_CHAR is generated by the TranslateMessage function) might work with a number of applications though (there's that problem with key states though). You would have to test with all the applications you wish to send input to if you would like to still continue with this route.

-- modified at 6:49 Thursday 6th July, 2006

ThatsAlok6-Jul-06 1:22

ThatsAlok

6-Jul-06 1:22

Meat Loaf wrote:
endInput doesn't take Hwnd as a param so is it not possible to specify the window? and hence you said "The window must have focus" ?

then First SetFocus on window and then send Keyinput to that window. Is setting focus on That window incurred any problem?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
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Smith#6-Jul-06 1:57

6-Jul-06 1:57

I haven't tried that yet. There must be no problem in setting the focus. But still I'd try to do it with a sendMessage.

NULL

ThatsAlok6-Jul-06 2:02

ThatsAlok

6-Jul-06 2:02

Meat Loaf wrote:
I haven't tried that yet. There must be no problem in setting the focus. But still I'd try to do it with a sendMessage.

then Simulate KeyPress by sending WM_KEYDOWN and WM_KEYUP message one after another!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Re

Muhammad Azam6-Jul-06 1:37

Muhammad Azam

6-Jul-06 1:37

hi,
Assuming m_pWnd is pointer to the window you want to send keys then use,

m_pWnd->SendMessage(WM_KEYDOWN,WPARAM(VK_DELETE),LPARAM(0x01530001));<br />
										m_pWnd->SendMessage(WM_KEYUP,WPARAM(VK_DELETE),LPARAM(0xC1530001));

::SendMessage(hwnd,WM_KEYDOWN,WPARAM(VK_DELETE),LPARAM(0x01530001));<br />
										::SendMessage(hwnd,WM_KEYUP,WPARAM(VK_DELETE),LPARAM(0xC1530001));

if this answers you then, vote for 5 Cool | :cool:

Smith#6-Jul-06 1:58

6-Jul-06 1:58

Muhammad Azam wrote:
::SendMessage(hwnd,WM_KEYDOWN,WPARAM(VK_DELETE),LPARAM(0x01530001));
::SendMessage(hwnd,WM_KEYUP,WPARAM(VK_DELETE),LPARAM(0xC1530001));

What's being stored in LPARAM here? Can you explain a bit?

NULL

Smith#6-Jul-06 1:59

6-Jul-06 1:59

what If I'd do the try the same with VK_F1 ? should I change the LPARAM accordingly?

NULL

Muhammad Azam6-Jul-06 2:27

Muhammad Azam

6-Jul-06 2:27

No I guess not, is it working with VK_F1?

Muhammad Azam6-Jul-06 2:41

Muhammad Azam

6-Jul-06 2:41

ok here is your explaination

1. Run your Application,
2. run spy++ and set it to capture KeyBorad messages (using Finder tool).
3. Press F1 key (or what ever key you want to send).
4. analyze the Messages log window and double click on the message having WM_KEYDOWN and nVirtualKey:VK_F1 or WM_KEYUP and nVirtualKey:VK_F1. Get LPARAM value from there.
you are done.

The LPARAM valur for F1 remains constant. no matter where you run your application and when you run it.

This way u can get LPARAM values for all your virtual key simulations,

infact LPARAM contains bit combinations for ScanCode,RepeatCout,AltDown, Extended Value for the WM_KeyDown event.

Thanks

Azam

Smith#6-Jul-06 3:22

6-Jul-06 3:22

Hey Still not working Frown | :(

. SendInput is the way to go I guess Unsure | :~

NULL

David Crow6-Jul-06 3:31

David Crow

6-Jul-06 3:31

See my example here.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Smith#6-Jul-06 19:18

6-Jul-06 19:18

Thanks david. It looks good I'll try that.

NULL

WIndows xp

ashish dogra5-Jul-06 23:59

Re: WIndows xp [modified]

5-Jul-06 23:59

i want to mage to make boarder as in dialog box in upper side
but i want to make this in lower side as in the windows xp and to put button on that.
plz tell me with example and detail as possible

Ashish Dogra
MCA
Noida

ashish dogra6-Jul-06 0:19

6-Jul-06 0:19

plz solve my problem
plz...................... nobody there to ans wer my question
virol can u

Ashish Dogra
MCA
Noida

-- modified at 6:38 Thursday 6th July, 2006

toxcct6-Jul-06 0:38

toxcct

6-Jul-06 0:38

i think this[^] could be interresting for you. you see to have some trouble

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

ashish dogra6-Jul-06 0:52

6-Jul-06 0:52

yar i simply ask question
that how can i put button on border of dialog box
and i want ti insert a border in the bottom of dialog box
this vc++ question
if there is any problem then i am sorry yar
but plz yar tell me some example .......
its important..............

Ashish Dogra
MCA
Noida

Hamid_RT6-Jul-06 1:03

Hamid_RT

6-Jul-06 1:03

I think you asked this question yesterday,right?and i answered to you

whitesky

ashish dogra6-Jul-06 1:07