显示屏幕分辨率

/*------------------------------------------------------
  ScreenSize.c -- Displays screen size in a message box
  ------------------------------------------------------*/
  
#include <windows.h>
#include <tchar.h>
#include <stdio.h>

int CDECL MessageBoxPrintf(TCHAR* szCaption, TCHAR* szFormat, ...)
{
    TCHAR szBuffer[1024];
    va_list pArgList;
    va_start(pArgList,szFormat);
    _vsntprintf(szBuffer,sizeof(szBuffer)/sizeof(TCHAR),szFormat,pArgList);
    va_end(pArgList);
    return MessageBox(NULL,szBuffer,szCaption,0);
}

int WINAPI WinMain(HINSTANCE hINSTANCE, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
    int cxScreen, cyScreen;

    cxScreen = GetSystemMetrics(SM_CXSCREEN);
    cyScreen = GetSystemMetrics(SM_CYSCREEN);

    MessageBoxPrintf(TEXT("ScrnSize"),
                     TEXT("The screen is %i pixels wide by %i pixels high."),
                     cxScreen, cyScreen);
    return 0;
}