Getting screen dimensions in windows

[Eric Davis]

Simply put, I'm trying to get the X and Y dimensions of my screen. I tried the below source, but the GetViewportExtEx() function only loads a 1 into both cx and cy. It looks as though it should work, but doesn't.

////////////////////////////////////////////////////////////

HDC hToScreenDC;
SIZE screensize;
long x, y;

hToWindowDC = GetDC(NULL);
GetViewportExtEx(hToScreenDC, &screensize)

x = screensize.cx;
y = screensize.cy;

ReleaseDC(NULL, hToScreenDC);

/////////////////////////////////////////////////////////////

All I want to do is center my application window on the screen. I'm very curious as to why this isn't working. Any help would be appreciated. Thanx

[Eric Davis]

I made an error while typing this. The problem still persists. Ignore the above typo

////////////////////////////////////////////////////////////

HDC hToScreenDC;
SIZE screensize;
long x, y;

//////////////////////////////////////
hToScreenDC = GetDC(NULL);
//////////////////////////////////////

GetViewportExtEx(hToScreenDC, &screensize)

x = screensize.cx;
y = screensize.cy;

ReleaseDC(NULL, hToScreenDC);

/////////////////////////////////////////////////////////////

[Eric Davis]

Got it!

// width
int cx = GetSystemMetrics(SM_CXSCREEN);
// height
int cy = GetSystemMetrics(SM_CYSCREEN);

I'm still curious why GetViewportExtEx() was returning only 1 has the X and Y dimension.