【windows程序设计】系列02:显示屏幕分辨率

#include <windows.h>
#include <tchar.h>
#include <stdio.h>

int CDECL MessageBoxPrintf (TCHAR * szCaption, TCHAR * szFormat, ...)
{
TCHAR   szBuffer [1024] ;
va_list pArgList ;

// The va_start macro (defined in STDARG.H) is usually equivalent to:
// pArgList = (char *) &szFormat + sizeof (szFormat) ;

va_start (pArgList, szFormat) ;// 得到第一个可变参数地址

// The last argument to wvsprintf points to the arguments

_vsntprintf (szBuffer, sizeof (szBuffer) / sizeof (TCHAR),
szFormat, pArgList) ;

// The va_end macro just zeroes out pArgList for no good reason

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) ;//以像素为单位的屏幕尺寸
cyScreen = GetSystemMetrics (SM_CYSCREEN) ;

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