public void WndProcRet(object sender, WndProcRetEventArgs e) { if (e.cw.message == Win32.Const.WM_INITDIALOG || e.cw.message == Win32.Const.WM_CHANGEUISTATE) { Win32.Function.MoveWindow(e.cw.hWnd, rect.Left, rect.Top, rect.Width, rect.Height, 1); // uninstall this hook WindowsHook wndHook = (WindowsHook)sender; Debug.Assert(wndProcRetHook == wndHook); wndProcRetHook.Uninstall(); wndProcRetHook = null; } }
public void WndActivate(object sender, CbtEventArgs e) { IntPtr hMsgBox = e.wParam; // try to find a howner for this message box if (hOwner == IntPtr.Zero) { hOwner = Win32.Function.GetActiveWindow(); } // get the MessageBox window rect Win32.RECT rectDlg = new Win32.RECT(); Win32.Function.GetWindowRect(hMsgBox, ref rectDlg); // get the owner window rect Win32.RECT rectForm = new Win32.RECT(); Win32.Function.GetWindowRect(hOwner, ref rectForm); // get the biggest screen area Rectangle rectScreen = TrueScreenRect; // if no parent window, center on the primary screen if (rectForm.right == rectForm.left) { rectForm.right = rectForm.left = Screen.PrimaryScreen.WorkingArea.Width / 2; } if (rectForm.bottom == rectForm.top) { rectForm.bottom = rectForm.top = Screen.PrimaryScreen.WorkingArea.Height / 2; } // center on parent int dx = ((rectDlg.left + rectDlg.right) - (rectForm.left + rectForm.right)) / 2; int dy = ((rectDlg.top + rectDlg.bottom) - (rectForm.top + rectForm.bottom)) / 2; rect = new Rectangle( rectDlg.left - dx, rectDlg.top - dy, rectDlg.right - rectDlg.left, rectDlg.bottom - rectDlg.top); // place in the screen if (rect.Right > rectScreen.Right) { rect.Offset(rectScreen.Right - rect.Right, 0); } if (rect.Bottom > rectScreen.Bottom) { rect.Offset(0, rectScreen.Bottom - rect.Bottom); } if (rect.Left < rectScreen.Left) { rect.Offset(rectScreen.Left - rect.Left, 0); } if (rect.Top < rectScreen.Top) { rect.Offset(0, rectScreen.Top - rect.Top); } if (e.IsDialog) { // do the job when the WM_INITDIALOG message returns wndProcRetHook = new WndProcRetHook(hMsgBox); wndProcRetHook.WndProcRet += new WndProcRetHook.WndProcEventHandler(WndProcRet); wndProcRetHook.Install(); } else { Win32.Function.MoveWindow(hMsgBox, rect.Left, rect.Top, rect.Width, rect.Height, 1); } // uninstall this hook WindowsHook wndHook = (WindowsHook)sender; Debug.Assert(cbtHook == wndHook); cbtHook.Uninstall(); cbtHook = null; }