Input from a File

[prog_tom]

//Sviesoft Corporation(r)
//Copyright(c) 1999 - 2001
//All Rights Reserved
//
//Thanks to God, my Mom and the people
//that have supported me all these years
//
//God Bless you all, Amen

//////////////////////////////////////////////////
//MONEY DISTRIBUTOR DATABASE FOR CHRISTIAN CAMP//
////////////////////////////////////////////////
//PROVIDED BY TOM ZHANG

#include <windows.h>
#include <iostream>
#include <fstream>
using namespace std;
const char tzID[]="myWindowClass";
char distributoR[MAX_PATH];
char datA[MAX_PATH];
HINSTANCE hInst;
HWND LABEL1;
#define BUT1 1
#define TEX1 2
LRESULT CALLBACK WndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam){
    ofstream PO("distributor.dis");
    ifstream PP("distributor.dis");
    switch(msg){
    case WM_SHOWWINDOW:
CHECKDATA:if(!PP.is_open()){MessageBox(hwnd,"Error while trying to get the DataBase file","",0);exit (1);}while(!PP.eof()){PP.getline(datA,MAX_PATH);}
          break;
    case WM_CREATE:
        LABEL1=CreateWindow("Static","Please Enter your name, Distributor",WS_CHILD|WS_VISIBLE,0,0,400,30,hwnd,NULL,hInst,NULL);
        CreateWindowEx(NULL,"button","Distribute",WS_CHILD|WS_VISIBLE,190,100,110,20,hwnd,(HMENU)BUT1,hInst,NULL);
        CreateWindowEx(NULL,"edit","",WS_CHILD|WS_VISIBLE,10,100,170,20,hwnd,(HMENU)TEX1,hInst,NULL);
        break;
    case WM_CLOSE:
        DestroyWindow(hwnd);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    case WM_COMMAND:
        switch(LOWORD(wParam)){
        case BUT1:
            GetDlgItemText(hwnd,TEX1,distributoR,GetWindowTextLength(GetDlgItem(hwnd,TEX1))+1);
            return 0;
            break;
        case TEX1:
            return 0;
            break;
        default:
            return 0;
        }
    default:
        THANKS:if(PO.is_open()){PO<<distributoR<<endl;PO.close();}
               return DefWindowProc(hwnd,msg,wParam,lParam);
    }
    return 0;
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow){
    WNDCLASSEX tz;
    HWND hwnd;
    MSG Msg;

    tz.cbSize=sizeof(WNDCLASSEX);
    tz.style=0;
    tz.lpfnWndProc=WndProc;
    tz.cbClsExtra=0;
    tz.cbWndExtra=0;
    tz.hInstance=hInstance;
    tz.hIcon=LoadIcon(NULL,IDI_APPLICATION);
    tz.hCursor=LoadCursor(NULL,IDC_ARROW);
    tz.hbrBackground=(HBRUSH)(COLOR_WINDOW+8);
    tz.lpszClassName=tzID;
    tz.lpszMenuName=NULL;
    tz.hIconSm=LoadIcon(NULL,IDI_APPLICATION);
    if(!RegisterClassEx(&tz)){
        MessageBox(hwnd,"An Error Occur while Registering this Program, you can contact the programmer at: [email][email protected][/email]","GOD BLESS YOU",2);
        return 0;
    }
    hwnd=CreateWindowEx(WS_EX_CLIENTEDGE,tzID,"God loves you",WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,300,200,NULL,NULL,hInstance,NULL);
    if(hwnd==NULL){
        MessageBox(hwnd,"An Error Occur while Creating the Windows, contact the programmer at: [email][email protected][/email]","God Bless You",4);
        return 0;
    }
    ShowWindow(hwnd,nCmdShow);
    UpdateWindow(hwnd);
    while(GetMessage(&Msg,NULL,0,0)){
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
    return Msg.wParam;
} 

For some reasons I can't read from the file Distributor.dis, though the file already exisits...