oWin:nGetChrHight() -> < nPixel>

------------------------------------------------------------------------------


 DESCRIPTION:

  ::nGetChrHeight() returns the hight of the font that is used to
  display text on the window. The hight is mesasured in pixel


 EXAMPLE:

     +-------------------------------------------------------------+
     |  /* get CharHigh and CharWide */                            |
     |  nCharHigh := oWin:nGetChrHeight()                          |
     |  nCharWide := oWin:GetWidth( "A" )                          |
     |                                                             |
     |  /* Get Parent Window Position */                           |
     |  oRect := oWin:GetCliRect()                                 |
     |  oRect:nTop += (( ::nPos - .5 ) * nCharHigh )               |
     |  oRect:nRight -= ( ::nPos * nCharWide ) + nCharWide         |
     |                                                             |
     |  /* MDI Size is 19 * 32 chars */                            |
     |  oRect:nBottom := oRect:nTop + ( nCharWide * 19 )           |
     |  oRect:nLeft := orect:nRight - ( nCharWide * 32 )           |
     |                                                             |
     |  /* - */                         |
     |  /* CREATE MDI WINDOW in Pixel ! */                         |
     |  /* - */                         |
     |  DEFINE WINDOW oChild ;                                     |
     |  FROM oRect:nTop,oRect:nLeft TO ;                           |
     |  oRect:nBottom,oRect:nRight ;                               |
     |  MDICHILD ;                                                 |
     |  PIXEL                                                      |
     +-------------------------------------------------------------+