Peek Message help

[Senith]

ok so I have a text box that I need to detect if any characters inside it has been changed.

I keep reading into it and everything I see has to do with PeekMessage.

I tried some eaxmples and is having no luck.


How can I get the messages from another control within my app like a edit box or a listbox

thanks

I know I ask for alot. but there is barely anything out there for API's. I keep finding MFC examples v_v

thanks again

[hoxsiew]

Why PeekMessage? Can't you just check for EN_CHANGE or EN_UPDATE notification to the parent?

[Senith]

How would I be able to do that?


I have a command open with my app to debug it and stuff and my text box when I do something other then giving it focus, it doesn't show up under my main form procedures.

[hoxsiew]

OK, I assume your not using MFC (because of the comment in the OP), so what are you using? The above makes little sense.

[Senith]

Just the basics. Like the getmessage dispatch message,etc.

I have a function called Procedures that gets the messages of the main window and what ever it is such as menu clicks,button clicks, takes care of that. I just need to get the messages for other controls such as a edit box.

I can't find anything on it besides PeekMessage or MFC.

[hoxsiew]

I still don't get it. Do you have a message loop? Just handle WM_NOTIFY and check for EN_CHANGE.

[Senith]

I still don't get it. Do you have a message loop? Just handle WM_NOTIFY and check for EN_CHANGE.

well I tried that and it didn't work

this is what I have:

/*--*/LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){// Gets the Application Procedure
/*|-*/
              

     
    
/*|-*//*--*/switch(msg){// Switch Message base on Application Message
/*|-*//*|-*/

            case WM_MOUSEMOVE:
                   //if(lParam==(int)rtfctl){
                     
                     // }
                      break;
/*|-*//*|-*/case WM_COMMAND:// Gets which command is in use

               
/*|-*//*|-*/   /*--*/switch(wParam){// Gets the sub command is in use
/*|-*//*|-*/   /*|-*/case ID_FILE_NEW: // File New command activated   
/*|-*//*|-*/   /*|-*/break;
/*|-*//*|-*/   /*|-*/case ID_FILE_OPEN:// File Open command activated
/*|-*//*|-*/   /*|-*/        DestroyWindow(hwnd);// This was here for a test/debug. Remove when this control gets used
/*|-*//*|-*/   /*|-*/break;
/*|-*//*|-*/   /*|-*/case ID_FILE_SAVE: // This was here for a test/debug. Remove when this control gets used
/*|-*//*|-*/   /*|-*/
/*|-*//*|-*/   /*|-*/break; 
/*|-*//*|-*/   /*|-*/case ID_FILE_SAVEAS:// Save As command activated              
/*|-*//*|-*/   /*|-*/break; 
/*|-*//*|-*/   /*|-*/case ID_FILE_PRINT:// File Print command activated
/*|-*//*|-*/   /*|-*/break; 
/*|-*//*|-*/   /*|-*/case ID_FILE_PRINTPREVIEW:// File Print Preview command activated
/*|-*//*|-*/   /*|-*/break; 
/*|-*//*|-*/   /*|-*/case ID_FILE_IMPORT://File Import command activated
/*|-*//*|-*/   /*|-*/break; 
/*|-*//*|-*/   /*|-*/case ID_FILE_RECENT://command activated
/*|-*//*|-*/   /*|-*/break; 
/*|-*//*|-*/   /*|-*/case ID_FILE_EXIT:// Exit command activated
/*|-*//*|-*/   /*|-*/DestroyWindow(hwnd);// Exits the main program
/*|-*//*|-*/   /*|-*/break; 
/*|-*//*|-*/   /*|-*/case ID_INSERT_NEWFORM://command activated
                   
/*|-*//*|-*/   /*|-*/break;                         

/*|-*//*|-*/   /*|-*/           //break;                          
/*|-*//*|-*/   /*--*/}
/*|-*//*|-*/  

/*|-*//*|-*/break;
/*|-*//*|-*/case WM_SIZE:// Resize Message
           #include "sizectrls.h"
           break;
           case WM_NOTIFY:
                      switch(lParam){
                      case EN_CHANGE:
                      MessageBox(0,"test","test",MB_OK);
                      break;                    
                                                  }
/*|-*//*|-*/break;
/*|-*//*|-*/case WM_CLOSE:// Close message
/*|-*//*|-*/DestroyWindow(hwnd);// Exits the main program
/*|-*//*|-*/break;
/*|-*//*|-*/case WM_DESTROY:// Terminate Message
/*|-*//*|-*/PostQuitMessage(0);// Terminates the main program
/*|-*//*|-*/default:
/*|-*//*|-*/return DefWindowProc(hwnd, msg, wParam, lParam);//Returns the defualt Messages to the main program
/*|-*//*--*/}
/*|-*/return 0;
/*|-*/}

[hoxsiew]

Sorry, it's been a while since I worked with windows at the API level. The correct method is to handle WM_COMMAND and check for your control ID, then handle its notifications there. Something like this:

HWND m_hEdit;
#define ID_EDIT1 1001

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
  int wmId, wmEvent;
  PAINTSTRUCT ps;
  HDC hdc;
  int i;

  switch (message)
  {
  case WM_CREATE:
    m_hEdit=CreateWindow(L"EDIT",L"Test",WS_BORDER|WS_VISIBLE|WS_CHILD|WS_TABSTOP|WS_GROUP,10,10,100,15,hWnd,(HMENU)ID_EDIT1,hInst,0);
    break;
  case WM_COMMAND:
    wmId    = LOWORD(wParam);
    wmEvent = HIWORD(wParam);
    switch (wmId)
    {
    case ID_EDIT1:
      switch(wmEvent){
        case EN_CHANGE:
        //handle change here
          break;
      }
      break;
    default:
      return DefWindowProc(hWnd, message, wParam, lParam);
    }
    break;
  case WM_DESTROY:
    PostQuitMessage(0);
    break;
  default:
    return DefWindowProc(hWnd, message, wParam, lParam);
  }
  return 0;
}

[Senith]

ok that works for the edit box control that you have included with your code.

but it won't work for the richedit control though

rtfctl = CreateWindow("RICHEDIT","text",WS_BORDER|WS_CHILD|WS_VISIBLE|ES_MULTILINE|ES_AUTOHSCROLL|WS_VSCROLL|WS_HSCROLL|WS_GROUP,40,30,300,300,MAINSS,(HMENU)ID_EDIT1,hInstance,0);

I think richedit hates me or something lol.

Thanks for posting that code btw. It will help me out with other controls too

[hoxsiew]

Rich edit has an event mask that you have to enable for events.

Add these lines:

  rtfctl = CreateWindow("RICHEDIT","text",WS_BORDER|WS_CHILD|WS_VISIBLE|ES_MULTILINE|ES_AUTOHSCROLL|WS_VSCROLL|WS_HSCROLL|WS_GROUP,40,30,300,300,MAINSS,(HMENU)ID_EDIT1,hInstance,0);
  LRESULT mask=SendMessage(rtfctl,EM_GETEVENTMASK,0,0);
  mask|=ENM_CHANGE;
  SendMessage(rtfctl,EM_SETEVENTMASK,0,(LPARAM)mask);

There's a bunch of other ENM_xxx mask values too. See:

http://msdn.microsoft.com/en-us/libr...66(VS.85).aspx

[Senith]

Thank you that works!

Thanks I appreciate it.

also what does the "crosses initialization of `int whileline' " mean in DEV?

[hoxsiew]

I don't know. WHat do you mean by "DEV"?

[Senith]

Dev C++ by Bloodshed I believe.

I keep getting a lot of these in my projects once in a while.

[hoxsiew]

I've never used DevC++ nor have I seen a warning like that.