C (Windows), 79 7878 77 bytes

Thanks to @Johan du Toit for saving a byte!

#import<windows.h>
#define G GetSystemMetrics(
f(){printf("%dx%d",G (0),G (1));}

C (Windows), 79 78 bytes

#import<windows.h>
#define G GetSystemMetrics(
f(){printf("%dx%d",G 0),G 1));}

Thanks to @Johan du Toit for saving a byte!

#import<windows.h>
#define G GetSystemMetrics
f(){printf("%dx%d",G(0),G(1));}

deleted 10 characters in body

Source Link

edited May 2, 2017 at 16:33

#import<windows.h>
g(x){x=GetSystemMetrics#define G GetSystemMetrics(x);}
f(){printf("%dx%d",g(G 0),g(G 1));}

#import<windows.h>
g(x){x=GetSystemMetrics(x);}
f(){printf("%dx%d",g(0),g(1));}

#import<windows.h>
#define G GetSystemMetrics(
f(){printf("%dx%d",G 0),G 1));}

Source Link

created May 2, 2017 at 16:28

#import<windows.h>
g(x){x=GetSystemMetrics(x);}
f(){printf("%dx%d",g(0),g(1));}