간단한 메모장 만들기

조건
- 10글자되면 자동 개행
- 5줄되면 끝내기



#include <windows.h>

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg,
 WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
 LPSTR lpszCmdLine, int nCmdShow)
{
 HWND   hwnd;
 MSG   msg;
 WNDCLASS WndClass; 
 WndClass.style = CS_HREDRAW | CS_VREDRAW;
 WndClass.lpfnWndProc = WndProc; 
 WndClass.cbClsExtra = 0; 
 WndClass.cbWndExtra = 0; 
 WndClass.hInstance = hInstance; 
 WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
 WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
 WndClass.lpszMenuName = NULL; 
 WndClass.lpszClassName = "Window Class Name";
 RegisterClass(&WndClass);
 hwnd = CreateWindow("Window Class Name",
  "Window Title Name",
  WS_OVERLAPPEDWINDOW,
  CW_USEDEFAULT,
  CW_USEDEFAULT,
  CW_USEDEFAULT,
  CW_USEDEFAULT,
  NULL,
  NULL,
  hInstance,
  NULL
  );
 ShowWindow(hwnd, nCmdShow);
 UpdateWindow(hwnd);
 while (GetMessage(&msg, NULL, 0, 0))
 {
  TranslateMessage(&msg);
  DispatchMessage(&msg);
 } 
 return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg,
 WPARAM wParam, LPARAM lParam)
{
 HDC   hdc;
 PAINTSTRUCT ps;
 static char str[5][11];
 static int count, yPos, line;
 int i,answer;

 switch (iMsg)
 {
 case WM_CREATE:
  count = 0;
  line=0;
  yPos = 0;
  break;
 case WM_PAINT:
  hdc = BeginPaint(hwnd, &ps);
  for(i=0; i<5; i++){
   TextOut(hdc, 0, i*20, str[i], strlen(str[i]));
  }
  EndPaint(hwnd, &ps);
  break;
 case WM_CHAR:
  if (wParam == VK_BACK)
   count--;
  else if (wParam == VK_RETURN)
  {
   count = 0;
   line++;
   if(line==5)
   {
    answer = MessageBox(hwnd, "끝", "끝", MB_OKCANCEL);
    PostQuitMessage(0);
   }
  }
  else
  {
   if(count==10)
   {
    line++;
    if(line==5)
    {
     answer = MessageBox(hwnd, "끝", "끝", MB_OKCANCEL);
     PostQuitMessage(0);
    }
    else
     count=0;
   }
   str[line][count++] = (TCHAR)wParam;
   str[line][count] = 0;
   InvalidateRgn(hwnd, NULL, FALSE);
  }
  break;
 case WM_DESTROY:
  PostQuitMessage(0);
  break;
 }
 return(DefWindowProc(hwnd, iMsg, wParam, lParam));
}

출력 결과