Question

How to print the screen resolution with MessageBoxW and _vsnwprintf_s in C Win32 API

Answer 1

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

int CDECL MsgBoxPrintf(wchar_t *szCaption,const wchar_t *szFormat, ...)
{
    wchar_t szBuffer[1024];
    va_list pArgsList;
    va_start(pArgsList, szFormat);
  
    _vsnwprintf_s(szBuffer, sizeof(szBuffer)/sizeof(wchar_t), 1024-1, szFormat, pArgsList);
    
	va_end(pArgsList);
        
	return MessageBoxW(0, 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);
    MsgBoxPrintf(L"My Screen Size",L"The Screen is: %i Pixels Width and %i Pixels Height.
                 \n\nScreen Resolution is: %ix%i", cxScreen, cyScreen, cxScreen, cyScreen);


    return(0);
}

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