请问如何用win32api实现MFC里的"CenterWindow"函数的功能？

[finalcrasher]

CenterWindow的功能就是使窗体居中显示，因为我最近用win32sdk编程，要用到这个功能。我查看MFC里CenterWindow的源代码，如下：

void CWnd::CenterWindow(CWnd* pAlternateOwner)
{
ASSERT(::IsWindow(m_hWnd));

// determine owner window to center against
DWORD dwStyle = GetStyle();
HWND hWndCenter = pAlternateOwner->GetSafeHwnd();
if (pAlternateOwner == NULL)
{
if (dwStyle & WS_CHILD)
hWndCenter = ::GetParent(m_hWnd);
else
hWndCenter = ::GetWindow(m_hWnd, GW_OWNER);
if (hWndCenter != NULL)
{
// let parent determine alternate center window
HWND hWndTemp =
(HWND)::SendMessage(hWndCenter, WM_QUERYCENTERWND, 0, 0);
if (hWndTemp != NULL)
hWndCenter = hWndTemp;
}
}
}

上述代码用win32api改写时基本无问题，但"WM_QUERYCENTERWND"这个是MFC里定义的，win32sdk里找不到，所以想请教高手该如何解决。

[布学无数]

#define CW_SCREEN 1
#define CW_WORKAREA 3

BOOL WINAPI CenterWindow(HWND hWnd,
DWORD dwFlags)
{
RECT rtWindow = {0};
RECT rtContainer = {0};

GetWindowRect(hWnd,&rtWindow);
rtWindow.right -= rtWindow.left;
rtWindow.bottom -= rtWindow.top;

switch(dwFlags)
{
case CW_SCREEN:
rtContainer.right = GetSystemMetrics(SM_CXSCREEN);
rtContainer.bottom = GetSystemMetrics(SM_CYSCREEN);
break;
case CW_WORKAREA:
SystemParametersInfo(SPI_GETWORKAREA,0,&rtContainer,0);
break;
}

return SetWindowPos(hWnd,NULL,(rtContainer.right - rtWindow.right) / 2,(rtContainer.bottom - rtWindow.bottom) / 2,0,0,SWP_NOSIZE);
}

[DentistryDoctor]

#define WM_QUERYCENTERWND 0x036B // lParam = HWND to use as centering parent

[syy64]

可以根据它的功能，自定义一个消息。

[palmax]

自己用MoveWindow()就可以实现了,先获得屏幕的分辨率,然后获得自己窗口的尺寸,然后二者的x和y分别做差除2,然后用MoveWindow()把自己的窗口移动到那个坐标不就OK了?

[finalcrasher]

ok，谢谢各位的帮助！