The WM_MOVE message is sent after a window has been moved.
WM_MOVE xPos = (int)(short) LOWORD(lParam); // horizontal position yPos = (int)(short) HIWORD(lParam); // vertical position
If an application processes this message, it should return zero.
The xPos and yPos parameters are given in screen coordinates for overlapped and pop-up windows and in parent-client coordinates for child windows.
An application can use the MAKEPOINTS macro to convert the lParam parameter to a POINTS structure.
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