Window 1 causing text on window 2

What I would like to do is this:
When a button is pushed on window 2 have text appear on window 1 (my main window). Both windows use a different WndProc.

I'm thinking off the following:

1) Process the button push under WM_COMMAND on window 2's WndProc. (done)

2) Use SendMessage to send a message to window 1's WndProc.

3) Process and return.

What I'm not sure of is how to code the SendMessage. Can you define your own WM_BLAHBLAH message?

Oh reason I want to use SendMessage over PostMessage is that I need to wait for the results of the other wndproc before I can continue.

Anyone able to point me in the right direction?

That's sounds about right.
1. Declare the window 1 handle as global
2. Capture the button click in window 2
3. Make your string
4. Use GetDlgItem(hWindow1,ID_EDITCONTROL) or something to get an edit control handle
5. Use SetWindowText to put the string there

If you want to use TextOut() in window 1 to print the text, you'll have to SendMessage(hWindow1, WM_USER+1,blah) and pass a pointer to the string. Capture the message in the window 1 procedure and use TextOut().

I hope that's clear enough.

1) ID_EDITCONTROL gave me an error so couldn't use GetDlgItem
2) SetWindowText changed the text on the title bar not inside the window.

I've changed the program up a little and put a read only edit box in window 1 and I think it might make it easier.

Well time for sleep. Will review in the morning and post code if I'm still not getting it.

Thanks

Weee got it working now. Here is snipets of my code if anyone is wondering:

Window 2 (Process the button push who's ID # is 1:

Code:

---

        case WM_COMMAND:
                if ( LOWORD (wParam) == 1 )
                    SendMessage (hMainWin, WM_COMMAND, LOWORD (1), lParam);
                   
                return 0;

---

Window 1 (Display the text):

Code:

---

        case WM_COMMAND:
                if ( LOWORD (wParam) == 1)
                  {
                  ScrollWindow (hMainWin, 0, -cyChar, &rect, &rect);
                 
                  hdc = GetDC (hMainWin);
                 
                  TextOut (hdc, cxChar, cyChar * (rect.bottom / cyChar - 2 ),
                            szBuffer, wsprintf(szBuffer, TEXT("Here is the text") ));
                  ReleaseDC (hMainWin, hdc);
                  }


                return 0;

---

Now on to the next part :)

>>1) ID_EDITCONTROL gave me an error so couldn't use GetDlgItem

You defined the ID of the control as 1

#define ID_EDITCONTROL 1 // this is usually set in the resource.h by the resource editor

>>2) SetWindowText changed the text on the title bar not inside the window.

Try

SetDlgItemText() if it is an edit or static ect.

ie
SetDlgItemText(hWindow1,1,"Some text to set.");