pt.x = 0;
pt.y = 0;
parent = GetParent(infoPtr->hwndSelf);
MapWindowPoints(infoPtr->hwndSelf, parent, &pt, 1);
OffsetWindowOrgEx (hdc, pt.x, pt.y, &ptorig);
pt.x = 0;
pt.y = 0;
parent = GetParent(infoPtr->hwndSelf);
MapWindowPoints(infoPtr->hwndSelf, parent, &pt, 1);
OffsetWindowOrgEx (hdc, pt.x, pt.y, &ptorig);