C / C++ / MFC

BOOL CALLBACK MergeProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
    static int MostRooms;
    bool bError;
    char *room,*year,*exam;

    switch(Message)
    {
        case WM_INITDIALOG:
            if (strlen(dlgdata[0])) {
                year = new char [10];
                strncpy(year,dlgdata[0]+2,4);
                strcpy(year+4,"\0");


                SendDlgItemMessage(hwnd,SD_MERGE_YEAR,    WM_SETTEXT,20,(LPARAM) year);
                delete year;
            }

            SendDlgItemMessage(hwnd,SD_MERGE_YEAR,    EM_LIMITTEXT,4,0);
            SendDlgItemMessage(hwnd,SD_MERGE_ROOM,    EM_LIMITTEXT,30,0);
            SendDlgItemMessage(hwnd,SD_MERGE_EXAM,    EM_LIMITTEXT,10,0);

            MostRooms = atoi(dlgdata[1]);

            EnumChildWindows(hwnd,EnumChildProc,(LPARAM)hFnt);
        return TRUE;

        case WM_COMMAND:
            switch (LOWORD(wParam)) {
                case IDOK:
                    bError = false;

                    room = new char [30];
                    year = new char [10];
                    exam = new char [30];

                    room[0] = (char)10;
                    year[0] = (char)10;
                    exam[0] = (char)30;

                    SendDlgItemMessage(hwnd,SD_MERGE_YEAR,EM_GETLINE,0,(LPARAM)year);
                    SendDlgItemMessage(hwnd,SD_MERGE_ROOM,EM_GETLINE,0,(LPARAM)room);
                    SendDlgItemMessage(hwnd,SD_MERGE_EXAM,EM_GETLINE,0,(LPARAM)exam);

                    if (strlen(room) > 0) {
                        if (!count_rooms(room,MostRooms+1) ) {
                            char tmp [128];
                            sprintf(tmp,"Please enter rooms between 0 and %i!",MostRooms+1);
                            MessageBox(0,tmp,0,0);
                            bError = true;
                        }
                    }
                    else if (!bError) {
                        MessageBox(hwnd,"Please enter a room!",0,0);
                        SetFocus(GetDlgItem(hwnd,SD_MERGE_ROOM));
                        bError = true;
                    }

                    if ( (strlen(year) > 0) && (!bError) ) {
                        if ((atoi(year) > 2000)&&(atoi(year) < 2100)) {
                            char *text = new char [10];
                            strcpy(text,"¸ß");
                            strcat(text,year);
                            strcat(text,"¼¶");
                            strcpy(year,text);
                            delete text;
                        }
                        else if (!bError) {
                            MessageBox(hwnd,"Please enter a year between 2000 and 2100!",0,0);
                            SetFocus(GetDlgItem(hwnd,SD_MERGE_YEAR));
                            bError = true;
                        }
                    }
                    else if (!bError) {
                        MessageBox(hwnd,"Please enter a year!",0,0);
                        SetFocus(GetDlgItem(hwnd,SD_MERGE_YEAR));
                        bError = true;
                    }

                    if ((strlen(exam) > 0) && (!bError) ) {
                    }
                    else if (!bError) {
                        MessageBox(hwnd,"Please enter an exam name!",0,0);
                        SetFocus(GetDlgItem(hwnd,SD_MERGE_EXAM));
                        bError = true;
                    }

                    if (bError) {
                        delete exam;
                        delete room;
                        delete year;
                        MessageBox(0,"An Error occured",0,0);
                    }
                    else {
                        dlgdata[0] = year;
                        dlgdata[1] = room; // contains a string of rooms
                        dlgdata[2] = exam;
                        EndDialog(hwnd,1);
                    }
                break;

                case IDCANCEL:
                    EndDialog(hwnd,0);
                break;
            }
        break;

        default:
        return FALSE;
    }
    return TRUE;
}