RECT windowRect;
GetClientRect( &windowRect );// Bounds of the current window

CWnd* controlWindow = GetDlgItem( controlId );
RECT controlRect;
controlWindow->GetWindowRect( &controlRect );//control rectangle
ScreenToClient( &controlRect );//control rectangle in the coordinate system of the parent

const int vertOffset = windowRect.top - controlRect.top;//how much to adjust
controlRect.top += vertOffset;
controlRect.bottom += vertOffset;
controlWindow->MoveWindow( &controlRect );