创建窗体后如何指定它在屏幕中的位置?

[wdxp119]

我创建了一个Dialog,如下:
hwnd=CreateDialog(hInstance,szAppName,NULL,NULL) ;
ShowWindow(hwnd, iCmdShow);
UpdateWindow (hwnd);
可是我如何才能指定该Dialog在屏幕中的位置,例如居中等等

[jronald]

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;
}
}

// get coordinates of the window relative to its parent
CRect rcDlg;
GetWindowRect(&rcDlg);
CRect rcArea;
CRect rcCenter;
HWND hWndParent;
if (!(dwStyle & WS_CHILD))
{
// don't center against invisible or minimized windows
if (hWndCenter != NULL)
{
DWORD dwStyle = ::GetWindowLong(hWndCenter, GWL_STYLE);
if (!(dwStyle & WS_VISIBLE) || (dwStyle & WS_MINIMIZE))
hWndCenter = NULL;
}

MONITORINFO mi;
mi.cbSize = sizeof(mi);

// center within appropriate monitor coordinates
if (hWndCenter == NULL)
{
HWND hwDefault = AfxGetMainWnd()->GetSafeHwnd();

GetMonitorInfo(
MonitorFromWindow(hwDefault, MONITOR_DEFAULTTOPRIMARY), &mi);
rcCenter = mi.rcWork;
rcArea = mi.rcWork;
}
else
{
::GetWindowRect(hWndCenter, &rcCenter);
GetMonitorInfo(
MonitorFromWindow(hWndCenter, MONITOR_DEFAULTTONEAREST), &mi);
rcArea = mi.rcWork;
}
}
else
{
// center within parent client coordinates
hWndParent = ::GetParent(m_hWnd);
ASSERT(::IsWindow(hWndParent));

::GetClientRect(hWndParent, &rcArea);
ASSERT(::IsWindow(hWndCenter));
::GetClientRect(hWndCenter, &rcCenter);
::MapWindowPoints(hWndCenter, hWndParent, (POINT*)&rcCenter, 2);
}

// find dialog's upper left based on rcCenter
int xLeft = (rcCenter.left + rcCenter.right) / 2 - rcDlg.Width() / 2;
int yTop = (rcCenter.top + rcCenter.bottom) / 2 - rcDlg.Height() / 2;

// if the dialog is outside the screen, move it inside
if (xLeft < rcArea.left)
xLeft = rcArea.left;
else if (xLeft + rcDlg.Width() > rcArea.right)
xLeft = rcArea.right - rcDlg.Width();

if (yTop < rcArea.top)
yTop = rcArea.top;
else if (yTop + rcDlg.Height() > rcArea.bottom)
yTop = rcArea.bottom - rcDlg.Height();

// map screen coordinates to child coordinates
SetWindowPos(NULL, xLeft, yTop, -1, -1,
SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
}

[mixtrue]

用SetWindowPos 设置位置

[echonmay]

可以使用SetWindowPos来设置窗口大小

[fanqing]

SetWindowPos

movewindow

[NOMADBLUE]

用SetWindowPos 设置位置

[NOMADBLUE]

movewindow也可以