void CAppDlg::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos)
if (lpwndpos->cx = -1)
if (lpwndpos->cy = -1) // is init time
lpwndpos->x = 0; // change here if you want to move left or right the window.
lpwndpos->y = 0; // change here if you want to move top or bottom the window.
After CreateDialogIndirect, the MFC call CenterWindow. The last line of this function call SetWindowPos with position of window, and with -1, -1, as width and height of window. So the WM_WINDOWPOSCHANGING is obviously.
Date Last Updated: April 19, 1999