Thread: Width of window border

Trying to get the width of a window border to accurately make a window's client area centered on the screen. Stumbled upon SystemParametersInfo + SPI_GETNONCLIENTMETRICS / SPI_GETBORDER. In both cases, it returns to me that the border is only one pixel. Which I have a hard time believing. I use this code:

Code:

int CenterWindow(HWND hwnd, int width, int height)
{
    NONCLIENTMETRICS ncm;
    
    rect scrrect;
    int ret = 0;
    
    ncm.cbSize = sizeof(NONCLIENTMETRICS);
    ret = ::SystemParametersInfo(SPI_GETWORKAREA, 0, &scrrect, 
                                 SPIF_UPDATEINIFILE);
    
    if(!ret)
        return 0;
    
    point center(scrrect.bx() / 2, scrrect.by() / 2);           
    point tl(center.x() - width / 2, center.y() - height / 2);
    
    ::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 
                          sizeof(NONCLIENTMETRICS), &ncm, 0);

    
    ret = ::MoveWindow(hwnd, tl.x() - ncm.iBorderWidth, tl.y() - 
                       ncm.iCaptionHeight, width + ncm.iBorderWidth, 
                       height + ncm.iBorderWidth, TRUE);

    return ret;
}

I call it with the width and height being the dimensions of the client area that I want. When the function is done, I call GetClientRect, and the bottom and right members of the RECT structure end up being 493 and 567. Is there another way I should be retrieving this sort of info? Is the computer LYING?

I am not sure about what you are asking but
GetSystemMetrics(SM_CXBORDER);
GetSystemMetrics(SM_CXEDGE);
GetSystemMetrics(SM_CXFIZEDFRAME);
Might help ???

Also, have a look at the AdjustWindowRect function.