WIN32 Problem!

This is a discussion on WIN32 Problem! within the Windows Programming forums, part of the Platform Specific Boards category; I Finally got one of my WIN32 apps to run, now it's not popping up a messagebox when I click ...

  1. #1
    Registered User
    Join Date
    May 2004
    Posts
    12

    Unhappy WIN32 Problem!

    I Finally got one of my WIN32 apps to run, now it's not popping up a messagebox when I click "New", am i missing something?

    Main.cpp
    Code:
    #include <windows.h>
    #include "resource.h"
    
    /*  Declare Windows procedure  */
    LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
    
    /*  Make the class name into a global variable  */
    char szClassName[ ] = "WindowsApp";
    
    int WINAPI WinMain (HINSTANCE hThisInstance,
                        HINSTANCE hPrevInstance,
                        LPSTR lpszArgument,
                        int nFunsterStil)
    
    {
        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 (NULL, IDI_APPLICATION);
        wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
        wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
        wincl.lpszMenuName  = MAKEINTRESOURCE(IDR_MYMENU);
        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_WINDOW+1);
    
        /* Register the window class, and if it fails quit the program */
        if (!RegisterClassEx (&wincl))
            return 0;
    
        /* The class is registered, let's create the program*/
        hwnd = CreateWindowEx (
               0,                   /* Extended possibilites for variation */
               szClassName,         /* Classname */
               "Windows App",       /* Title Text */
               WS_OVERLAPPEDWINDOW, /* default window */
               CW_USEDEFAULT,       /* Windows decides the position */
               CW_USEDEFAULT,       /* where the window ends up on the screen */
               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))
        {
            /* Translate virtual-key messages into character messages */
            TranslateMessage(&messages);
            /* Send message to WindowProcedure */
            DispatchMessage(&messages);
        }
    
        /* The program return-value is 0 - The value that PostQuitMessage() gave */
        return messages.wParam;
    }
    
    
    /*  This function is called by the Windows function DispatchMessage()  */
    
    LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    {    
        switch (message)                  /* handle the messages */
        {   
            case WM_COMMAND:
                 {
                   case ID_FILE_EXIT:
                   PostQuitMessage (0);
                   break;
                   case ID_FILE_NEW:
                   MessageBox (NULL, "Sorry, this function is currently unavailable." 
                   ,"Unavailable", MB_OK);
                   break;
                   }    
            case WM_DESTROY:
                PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
                break;
            default:                      /* for messages that we don't deal with */
                return DefWindowProc (hwnd, message, wParam, lParam);
         }
        return 0;
    }
    resource file:
    Code:
    #include "resource.h"
    
    IDR_MYMENU MENU
    BEGIN
        POPUP "File"
        BEGIN
            MENUITEM "New", ID_FILE_NEW
        
            MENUITEM "Exit", ID_FILE_EXIT
        END
    
        POPUP "Edit"
        BEGIN
            MENUITEM "Edit",0
            MENUITEM "Copy",0
            MENUITEM "Paste",0   
        END
    END
    resource.h:
    Code:
    #define IDR_MYMENU 101
    
    #define ID_FILE_NEW 9001
    #define ID_FILE_EXIT 9002
    please help!!!

  2. #2
    Sweet
    Join Date
    Aug 2002
    Location
    Tucson, Arizona
    Posts
    1,810
    Its because your are not checking the LOWORD of the wParam. You are going to have to check that by doing this.
    Code:
    switch(LOWORD(wParam))
    {    
        case ID_FILE_EXIT:
            PostQuitMessage(0);
            break;
        case ID_FILE_NEW:
            MessageBox (NULL, "Sorry, this function is currently unavailable.",
                        "Unavailable", MB_OK);
            break;
    }
    Woop?

  3. #3
    &TH of undefined behavior Fordy's Avatar
    Join Date
    Aug 2001
    Posts
    5,789
    Moved to windows board

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