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Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\DWM
AccentColor

// \samples\DARKMODE.PRG - 17/11/2021 - Joao. Windows 7 32 Bits.

#Include "FiveWin.ch"
#Include "wColors.ch"

STATIC oWnd

FUNCTION Main()

   LOCAL oBar, cTitle, nRet

   cTitle := "RODRIGUES & AMORIM MECANICA LTDA"  // WHITE NO FUNCIONA.

   DEFINE WINDOW oWnd TITLE cTitle // MDI ?? NO FUNCIONA NORMAL.

   DEFINE BUTTONBAR oBar _3D OF oWnd

   DEFINE BUTTON OF oBar ACTION( Finaliza() )

   SET MESSAGE OF oWnd TO cTitle NOINSET CLOCK DATE KEYBOARD

   ACTIVATE WINDOW oWnd MAXIMIZED ;
      ON INIT( SetSysColors( { COLOR_ACTIVECAPTION, COLOR_INACTIVECAPTION  }, ;
                             { COLOR_CAPTIONTEXT, COLOR_INACTIVECAPTIONTEXT } ) )

RETURN NIL

FUNCTION Finaliza()

   oWnd:End()

RETURN NIL

#IFDEF __XHARBOUR__  // Modificado em: 16/11/2021 - Joao

// if xHarbour -> Nages:
// For xHarbour change hb_parvni as hb_parni and hb_parvnl as hb_parnl

#pragma BEGINDUMP

#include <windows.h>
#include <hbapi.h>

HB_FUNC( SETSYSCOLORS ) // ( aItems, aColors ) --> lSuccess
{
   BOOL     bRet        = FALSE;
   int      iElements;
   INT      aElements[22];
   COLORREF aRgbValues[22];

   if ( ( iElements = hb_parinfa( 1, 0 ) ) == ( int ) hb_parinfa( 2, 0 ) )
   {
      int i;
      for ( i = 1; i <= iElements; i++ )
      {
         aElements [ i - 1 ]  = hb_parni( 1, i );
         aRgbValues[ i - 1 ]  = hb_parnl( 2, i );
         bRet  = SetSysColors( iElements, aElements, aRgbValues );
      }
   }
   hb_retl( bRet );
}

#pragma ENDDUMP

#ELSE

#pragma BEGINDUMP

#include <windows.h>
#include <hbapi.h>

// if harbour
HB_FUNC( SETSYSCOLORS ) // ( aItems, aColors ) --> lSuccess
{
   BOOL     bRet        = FALSE;
   int      iElements;
   INT      aElements[22];
   COLORREF aRgbValues[22];

   if ( ( iElements = hb_parinfa( 1, 0 ) ) == ( int ) hb_parinfa( 2, 0 ) )
   {
      int i;
      for ( i = 1; i <= iElements; i++ )
      {
         aElements [ i - 1 ]  = hb_parvni( 1, i );
         aRgbValues[ i - 1 ]  = hb_parvnl( 2, i );
         bRet  = SetSysColors( iElements, aElements, aRgbValues );
      }
   }
   hb_retl( bRet );
}

#pragma ENDDUMP

#ENDIF

// FIN / END