Winapi, dialog box procedure problem
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  1. #1
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    Question Winapi, dialog box procedure problem

    Hey , first post Thanks all in advance, ive already been helped soo much by this site and others.


    Problem: I have 2 dialog box's and 2 dialog box procedures: BOOL 'name'DlgProc(bla bla).
    I am using a resource file to define the buttons, sizes ect.
    My 2 dialog box's work perfectly,I run into a issue when i create the third.

    Create Box definitions in resource file much the same as the others, create a third DlgProc().
    I run the program, when I open the first 2 dialog box's that work perfectly.
    When i run the third however, the box itself doesnt quite draw or become its own entity so
    to speak.
    I can see/click/edit the buttons/editbox's but the box itself doesnt draw.

    Now the percuilar(i cant spell) thing is that if, when i call the third dialog box, i instead of calling
    the new(third) DlgProc(), i call the second or the first, it draws perfectly.
    I have cut and pasted the first and second dialog box procedures and simply renamed and still
    the same issue(so i know its not some coding error, thus i didnt post any).

    Happy to post code if nessasry, but as i said, i have 2 box's working perfectly if i get rid of one of the other box's proc,
    the third works, is there a limit on how many DlgProc()'s your aloud to have?


    Thanks in Advance, Michael.

  2. #2
    Join Date
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    Re: Winapi, dialog box procedure problem

    Best to post some code. Even better, assuming you're using Visual Studio, zip up your project directory (minus the .ncb, .aps, .suo, files and Debug and Release directories) ans post it here. There's no way to diagnose your problem from the information given.

  3. #3
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    Re: Winapi, dialog box procedure problem

    Code:
    LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
    
    
    // globals
    
    
    char szClassName[ ] = "Mb Program !";
    
    int WINAPI WinMain (HINSTANCE hThisInstance,
                        HINSTANCE hPrevInstance,
                        LPSTR lpszArgument,
                        int nFunsterStil)
    
    {//WinMain() Open
        HWND hwnd;               /* This is the handle for our window */
        MSG messages;            /* Here messages to the application are saved */
        WNDCLASSEX wincl;        /* Data structure for the windowclass */
    
        /* The Window structure */
        wincl.hInstance = hThisInstance;
        wincl.lpszClassName = szClassName;
        wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
        wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
        wincl.cbSize = sizeof (WNDCLASSEX);
    
        /* Use default icon and mouse-pointer */
        wincl.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON));
        wincl.hIconSm = (HICON)LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON), IMAGE_ICON, 16, 16, 0);
        wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
        wincl.lpszMenuName = MAKEINTRESOURCE(IDR_MYMENU);                 /* No menu */
        wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
        wincl.cbWndExtra = 0;                      /* structure or the window instance */
        /* Use Windows's default color as the background of the window */
        wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
    
        /* Register the window class, and if it fails quit the program */
        if (!RegisterClassEx (&wincl))
            return 0;
    
        /* create the program window*/
        hwnd = CreateWindowEx (
               WS_EX_DLGMODALFRAME,  /*Specifies the extended window style of the window being created*/
               szClassName,         /* Classname */
               "MB TIPPIN",      /* Title Text */
               WS_OVERLAPPEDWINDOW, /* style - default window */
               200,                 /* X pos */
               200,                 /* Y pos */
               544,                 /* The programs width */
               375,                 /* and height in pixels */
               HWND_DESKTOP,        /* The window is a child-window to desktop */ 
               NULL,                /* No menu */
               hThisInstance,       /* Program Instance handler */
               NULL                 /* No Window Creation data */
               );
    
        /* Make the window visible on the screen */
        ShowWindow (hwnd, nFunsterStil);
    
        /* Run the message loop. It will run until GetMessage() returns 0 */
        while (GetMessage (&messages, NULL, 0, 0))
        { //While Open
            /* Translate virtual-key messages into character messages */
            TranslateMessage(&messages);
            /* Send message to WindowProcedure */
            DispatchMessage(&messages);
        }//While Close
    
        /* The program return-value is 0 - The value that PostQuitMessage() gave */
        return messages.wParam;
    }// WinMain() Close
    Code:
    // first dlgproc
    BOOL CALLBACK ENTERTIPSDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
    {//open TipsDlgProc
     switch(Message)
        {//open Switch
       
                case WM_INITDIALOG:
                     {
        
                     return TRUE;
                     }
                case WM_COMMAND:
                     {//wm command open
                  
                     switch(LOWORD(wParam))
                     {
                                           //case's
                                           }
                                           }
                                           }
     
     // 2 OTHER DLG PROCS THE SAME AS THIS, EXCEPT DIFFERNT CASES FOR BUTTONS ECT


    Code:
    LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    {//WindowProcedure() open
        switch (message)                  /* handle the messages */
        { // Switch Open
            case WM_DESTROY:
                 {
                PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
                break;
                 }
    
     // ******* START WM_COMMAND ***************************************WM_COMMAND*********
            case WM_COMMAND:
                 { //WM_COMMAND Open
                            switch(LOWORD(wParam))
                            {//Switch(LOWORD(wParam)) open
                                                 case ID_FILE_EXIT: // exit check and exit...
                            if((MessageBox(hwnd, "Are you Sure you want to quit?","Attention",
                                           MB_YESNO | MB_ICONEXCLAMATION) ==IDNO))
                            return DefWindowProc(hwnd, message, wParam, lParam);
                            else PostQuitMessage (0);
                            break;
                                                 case ID_FILE_NEW:
                                                      {//ID_FILE_NEW open
                   DialogBox(GetModuleHandle(NULL), 
                   MAKEINTRESOURCE(IDD_NEW), hwnd, NewDlgProc);
             break;
        
                                                    } /* ID_FILE_NEW CLOSE */
                                                    case ID_FILE_ENTERTIPS:
                                                         { //ID-FILE_ENTERTIPS open
                                                        
                                                         
                   DialogBox(GetModuleHandle(NULL), 
                   MAKEINTRESOURCE(IDD_ENTERTIPS), hwnd, ENTERTIPSDlgProc);
                  
                   break;
                                                         } // ID_FILE_ENTER TIPS CLOSE
                                                  case ID_FILE_ENTER_RESULTS:
                                                       {
                   DialogBox(GetModuleHandle(NULL), 
                   MAKEINTRESOURCE(IDD_ENTER_RESULTS), hwnd, ENTERTIPSDlgProc);
                   break;
                                                       }
                                                                            
                
                            
                            
                            
                            
                            
                            }/* WM_command Switch Bracket Close */
                 } /* Wm_command Bracket  Close*/
                                                                 
                                                 
            default:   /* Default for WindowProcedure() Switch */                
                return DefWindowProc (hwnd, message, wParam, lParam);
        } /* WindowProcedure() Switch(message) bracket  Close*/
    
      //************************************************************
    Working with Dev C++ compiler.
    Sorry if posting code like this is wrong, first time ive posted on this site(any site acually )/
    Last edited by ovidiucucu; June 12th, 2010 at 09:42 AM. Reason: aded [CODE] and [/CODE] tags

  4. #4
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    Re: Winapi, dialog box procedure problem

    //***********************************************************************************
    IDD_NEW DIALOG 0, 0, 239, 66 // ID = IDD_NEW TYPE = Dialog box
    CAPTION "New Player Rego" // diaglog box name
    FONT 12, "MS Sans Sherri" //font and text type
    BEGIN
    CTEXT "Player Name:", IDC_STATIC, 10,29,90,14 // text in dialog box
    EDITTEXT IDC_EDITBOX, 80,24,90,14, ES_AUTOHSCROLL // edit box for dialog box
    DEFPUSHBUTTON "Create Player", ID_CREATE_PLAYER,174,24,50,14 // create button for dialog box
    PUSHBUTTON "Quit", ID_QUIT, 174,45,50,14 // quit button for dialog box
    END
    //**************************************************************************

    All three dialog box's have exact same structure as this.
    and everythign is defined in header file correctly

  5. #5
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    Re: Winapi, dialog box procedure problem

    Quote Originally Posted by eggyegg123 View Post
    Code:
                   MAKEINTRESOURCE(IDD_ENTERTIPS), hwnd, ENTERTIPSDlgProc);
                  
    ........
                   MAKEINTRESOURCE(IDD_ENTER_RESULTS), hwnd, ENTERTIPSDlgProc);
    So, you are using the same dialog proc routine for two different dialog windows? I wonder if this is part of the problem.

  6. #6
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    Re: Winapi, dialog box procedure problem

    srry bout the bodgey code dump, will try post more compilable code tomoz( main project is on work pc, i work alotta night shifts and get time to code in the wee hours of the morning).

    Quote: cosmicvoid
    *So, you are using the same dialog proc routine for two different dialog windows? I wonder if this is part of the problem.

    Well yes atm i am its a bad solution to the problem im having, if i call one of the first 2 procedures for the third dialog box, the box functions as expected. Its only when i call the third procedure that the box will not draw correctly, even if i simply copy/paste the first/second procedure and rename it.

    Atm im using the second dialog procedure to open my third dialog box, and using unique case ID's to give it functionality, its working quite well, but i know its wrong and don't understand why im having the issue to begin with

    Thanks for taking the time to look it over any way, i will post full code, zipped or other wise tommorow.
    (program should run on your pc, however will not function as intended, due to fixed file paths im using for testing.)

  7. #7
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    Location
    Voronezh, Russia
    Posts
    5,877

    Re: Winapi, dialog box procedure problem

    I can see/click/edit the buttons/editbox's but the box itself doesnt draw.
    Usually this happens when dialog procedure returns TRUE by default.

    Code:
    BOOL CALLBACK DlgProc(HWND hDlg, UINT msg, WPARAM wp, LPARAM lp)
    {
    . . .
        return TRUE; // while FALSE should be here
    }
    Last edited by Igor Vartanov; June 13th, 2010 at 05:35 PM.
    Best regards,
    Igor

  8. #8
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    Smile Re: Winapi, dialog box procedure problem

    ahh ok, il try that tonight, and let you know how it goes thx very much for the tip.

  9. #9
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    Re: Winapi, dialog box procedure problem

    Trying to cut-n-paste all that into something that I can get to compile is proving to be near impossible. Do you have a project you can zip up?

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