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 GetMapMode()           Retrieves the current mapping mode
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   Syntax:              GetMapMode( <hDC> )  --> <nMapMode>

                        The function retrieves the current mapping mode
                        for a given device context.

   Parameters:

   <hDC>                The handle of the device context.

   Returns:

   <nMapMode>           A numeric value of the followings:

                        MM_ANISOTROPIC  Logical units are converted to
                                        arbitrary units with arbitrarily
                                        scaled axes.
                                        Setting the mapping mode to
                                        MM_ANISOTROPIC does not change the
                                        current window or viewport settings.
                                        To change the units, orientation, and
                                        scaling, an application should use the
                                        SetWindowExt and SetViewportExt
                                        functions.
                        MM_HIENGLISH    Each logical unit is converted to
                                        0.001 inch. Positive x is to the
                                        right; positive y is up.
                        MM_HIMETRIC     Each logical unit is converted to 0.01
                                        millimeter. Positive x is to the right;
                                        positive y is up.
                        MM_ISOTROPIC    Logical units are converted to
                                        arbitrary units with equally scaled
                                        axes; that is, one unit along the
                                        x-axis is equal to one unit along the
                                        y-axis. The SetWindowExt and SetViewportExt
                                        functions must be used to specify
                                        the desired units and the orientation
                                        of the axes. GDI makes adjustments as
                                        necessary to ensure that the x and y
                                        units remain the same size.

                        MM_LOENGLISH    Each logical unit is converted to 0.01
                                        inch. Positive x is to the right;
                                        positive y is up.
                        MM_LOMETRIC     Each logical unit is converted to 0.1
                                        millimeter. Positive x is to the
                                        right; positive y is up.
                        MM_TEXT         Each logical unit is converted to one
                                        device pixel. Positive x is to the
                                        right; positive y is down.
                        MM_TWIPS        Each logical unit is converted to 1/20
                                        of a point. (Because a point is 1/72
                                        inch, a twip is 1/1440 inch). Positive
                                        x is to the right; positive y is up.

   Source code:         SOURCE\\WINAPI\\SetMapMo.c

   See also:            SetMapMode() SetWindowExt() SetWindowOrg()