非MFC CalcWindowRect()?

AdjustWindowRectEx

没有精确的一对一替换函数,但是 AdjustWindowRectEx 很接近。如果使用 CWnd::adjustOutside 你需要自己调整滚动条。

例如:

// MFC version
RECT desiredClientRect = {0, 0, 640, 480};
myCwnd->CalcWindowRect(&desiredClientRect,
    ignoreScrollBars ? CWnd::adjustBorder : CWnd::adjustOutside);

// Win32 version
RECT desiredClientRect = {0, 0, 640, 480};
DWORD dwStyle = GetWindowLong(myHwnd, GWL_STYLE);
AdjustWindowRectEx(&desiredClientRect,
    dwStyle,
    (GetMenu(myHwnd) != NULL),           // bMenu
    GetWindowLong(myHwnd, GWL_EXSTYLE)); // dwExStyle
if(!ignoreScrollBars)
{
    if(dwStyle & WS_HSCROLL)
        desiredClientRect.right += GetSystemMetrics(SM_CXHSCROLL);
    if(dwStyle & WS_VSCROLL)
        desiredClientRect.bottom += GetSystemMetrics(SM_CXVSCROLL);
}