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| |
| VCL positioning |
| |
| Window coordinates are parent relative, with exception of maState fields, they |
| have screen coordinates. |
| |
| Every window has a parent window, usually the client area of an existing window, |
| otherwise the desktop window. |
| |
| When a window is to be sized/moved, SetPosSize is called. |
| Since coordinates are the position/size of client area, we need to calculate |
| current window frame size/position and map to screen coordinates using the |
| owner window position as offset. |
