DWORD GetViewportExt(hDC)
This function retrieves the x- and y-extents of the device context's viewport.
| Parameter | Type/Description |
| hDC | HDC Identifies the device context. |
The return value specifies the x- and y-extents (in device units). The y-extent is in the
high-order word; the x-extent is in the low-order word.