Sending text to program.

Hey.

I use this line to send a char to a program.

PostMessage(hApp, WM_USER + 1678, Ord(AryChar[0]), 0);

Any idea how you send text to a program, since I can only use integers with this.

Thanks.
JuiciJJAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

GloomyFriarCommented:
To interprocess communications you can use:
1. Memory mapped files
2. Pipes
3. TCP/IP, UDP
4. Dll with shared segment
0
DaFoxCommented:
Hi,

PostMessage(..., Integer(PChar(str)), 0);

Markus
0
andrewjbCommented:
.... send lots of chars, one after another?

You can't directly send a string, since the memory for that string would be in the wrong application. The message passing mechanism only has space for a couple of integers or pointers, so you just can't. Alternative is to use some other inter-process mechanism like pipes, or shared memory, or RPC or COM or something.
0
Cloud Class® Course: C++ 11 Fundamentals

This course will introduce you to C++ 11 and teach you about syntax fundamentals.

andrewjbCommented:
DaFox - don't think that'll work.
0
DaFoxCommented:
You're right - passing pointers does only work inside your own process. Silly me... Sorry!!
0
gmayoCommented:
One way is to use a hidden edit box on the other app and use that to send the text. You can even "press" a button to indicate to the other app that the text is there!

procedure SetWindowTextEx(win : HWND; text : string);
var
      res : DWORD;
begin
      SendMessageTimeout(win, WM_SETTEXT, 0, Integer(@text[1]), 0, 1000, res);
end;

Get the handle of the edit box (using FindWindow and/or EnumChildWindows) and pass that to the above function along with the text you wish to pass.

Geoff M.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
BJThomsenCommented:
type

TCopyDataStruct = record
  dwData: LongInt; // User Defined Data Param
  cbData: LongInt; // Length of data pointed to by lpData
  lpData: Pointer;
end;

TRecToPass = packed record
  s: string[255];
end;

procedure SendAString;
var
  Msg: TCopyDataStruct;
  Rec: TRecToPass;
Begin
  Rec.s := 'Hi There I'm a String';


  Msg.dwData := 0; // User Defined
  Msg.cbData :=  sizeof(Rec) // Size of data pointed to
  Msg.lpData := @Rec
  SendMessage (hApp, WM_COPYDATA,  WPARAM (Application.Handle), LPARAM (@Msg));

end;
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.