간단한 메시지맵으로의 처리.

전에 API로 작업한 마우스좌표와 타이머의 내용을
메시지맵으로 구현한것 임.(간단 명료 ㅋㅋ)



#include<windows.h>

#define dim(x) (sizeof(x) / sizeof(x[0]))
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
LPCTSTR lpszClass=TEXT("First");

LRESULT MOUSEMOVE(HWND, UINT, WPARAM, LPARAM);
LRESULT LBUTTONUP(HWND, UINT, WPARAM, LPARAM);
LRESULT DESTROY(HWND, UINT, WPARAM, LPARAM);

struct decodeUINT
{
 UINT Code;
 LRESULT (*Fxn)(HWND, UINT, WPARAM, LPARAM);
};

const struct decodeUINT MainMessages[] = {
 WM_MOUSEMOVE, MOUSEMOVE,
 WM_LBUTTONUP, LBUTTONUP,
 WM_DESTROY, DESTROY
};

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
      ,LPSTR lpszCmdParam,int nCmdShow)
{
 HWND hWnd;
 MSG Message;
 WNDCLASS WndClass;
 g_hInst = hInstance;

 WndClass.cbClsExtra=0;
 WndClass.cbWndExtra=0;
 WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
 WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
 WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
 WndClass.hInstance=hInstance;
 WndClass.lpfnWndProc=WndProc;
 WndClass.lpszClassName=lpszClass;
 WndClass.lpszMenuName=NULL;
 WndClass.style=CS_HREDRAW | CS_VREDRAW;
 RegisterClass(&WndClass);

 hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
  CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
  NULL,(HMENU)NULL,hInstance,NULL);
 ShowWindow(hWnd,nCmdShow);

 while(GetMessage(&Message,NULL,0,0)){
  TranslateMessage(&Message);
  DispatchMessage(&Message);
 }
 return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)

{
 
 int i;

 for(i = 0; i < dim(MainMessages); i++)
 {
  if(iMessage == MainMessages[i].Code)
  {
   return (*MainMessages[i].Fxn)(hWnd, iMessage, wParam, lParam);
  }
 }

 return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}

LRESULT MOUSEMOVE(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
 TCHAR str[128];
 SYSTEMTIME st;

 GetLocalTime(&st);
 wsprintf(str,TEXT("X = %d. Y = %d. %d시 %d분 %d초"),LOWORD(lParam),HIWORD(lParam),
  st.wHour, st.wMinute,st.wSecond);
 SetWindowText(hWnd,str);
 return 0;
}

LRESULT LBUTTONUP(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
 HDC hdc;
 static int x;
 static int y;

 hdc = GetDC(hWnd);
 MoveToEx(hdc,x,y,NULL);
 x = LOWORD(lParam);
 y = HIWORD(lParam);
 LineTo(hdc,x,y);
 ReleaseDC(hWnd,hdc);
 return 0;

}
LRESULT DESTROY(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
 PostQuitMessage(0);
 return 0;
}