os 버전알기 (GetVersionEx)

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
HWND hWndMain;
LPSTR lpszClass="OSVersion";

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)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);
    hWndMain=hWnd;
    
    while(GetMessage(&Message,0,0,0)) {
        TranslateMessage(&Message);
        DispatchMessage(&Message);
    }
    return Message.wParam;
}

void PrintOsVersion(HDC hdc)
{
    OSVERSIONINFO osv;
    char str[255];
    char Plat[255];

    osv.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
    GetVersionEx(&osv);
    wsprintf(str,"운영체제 버전 = %d.%d, 빌더 넘버=%d",
        osv.dwMajorVersion, osv.dwMinorVersion, osv.dwBuildNumber);
    TextOut(hdc,50,50,str,strlen(str));
    switch(osv.dwPlatformId) {
    case VER_PLATFORM_WIN32s:
        strcpy(Plat,"윈도우즈 3.1의 Win32s");
        break;
    case VER_PLATFORM_WIN32_WINDOWS:
        strcpy(Plat,"윈도우즈 95/98");
        break;
    case VER_PLATFORM_WIN32_NT:
        strcpy(Plat,"윈도우즈 NT, 2000");
        break;
    }
    
    wsprintf(str,"플렛폼=%s, 서비스팩=%s",Plat,osv.szCSDVersion);
    TextOut(hdc,50,70,str,strlen(str));
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    switch(iMessage) {
    case WM_PAINT:
        hdc=BeginPaint(hWnd, &ps);
        PrintOsVersion(hdc);
        EndPaint(hWnd, &ps);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}