FAQ C++ BuilderConsultez toutes les FAQ

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int width = Screen->Width; // longueur 
int height = Screen->Height; // hauteur 
ShowMessage("La résolution de l'écran est :" + IntToStr(width) + "*" + IntToStr(height));

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bool __fastcall ChangeResolution(int Width, int Height) 
{ 
   TDeviceMode *Dev = new TDeviceMode; 
   EnumDisplaySettings(0,ENUM_CURRENT_SETTINGS, Dev); 
   Dev->dmPelsWidth = Width; 
   Dev->dmPelsHeight = Height; 
   Dev->dmFields = DM_PELSWIDTH | DM_PELSHEIGHT; 
   bool result = (ChangeDisplaySettingsA(Dev, CDS_RESET) == DISP_CHANGE_SUCCESSFUL); 
   delete Dev; 
   return result; 
}

ChangeDisplaySettingsA(0, 0);

SendMessage(Application->Handle, WM_SYSCOMMAND, SC_SCREENSAVE, 1);

SendMessage(Application->Handle, WM_SYSCOMMAND, SC_MONITORPOWER, 1);

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SystemParametersInfo(unsigned int uiAction,  
unsigned int uiParam,  
void * pvParam,  
unsigned int fWinIni)

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//--------------------------------------------------------------------------- 
// Au lancement de l'application on modifie les valeurs d'attente 
void __fastcall TForm1::FormCreate(TObject *Sender) 
{ 
   // si l'écran de veille est actif 
   if(!SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0, NULL, SPIF_UPDATEINIFILE)) 
   { 
      SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, 0, NULL, SPIF_UPDATEINIFILE); 
   } 
  
   // On récupère le temps d'attente avant la mise en veille 
  
   SystemParametersInfo(SPI_GETPOWEROFFTIMEOUT, 0, &Param, SPIF_UPDATEINIFILE); 
   ShowMessage(IntToStr(Param)); 
   if(Param > 0) 
   { 
      // on désactive la mise en veille 
      SystemParametersInfo(SPI_SETPOWEROFFTIMEOUT, 0, NULL, SPIF_UPDATEINIFILE); 
   } 
} 
//--------------------------------------------------------------------------- 
// A la fermeture de l'application on rétablit les valeurs 
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action) 
{ 
   if(!SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 1, NULL, SPIF_UPDATEINIFILE)) 
   { 
       SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, 1, NULL, SPIF_UPDATEINIFILE); 
   } 
  
   if(Param > 0) 
   { 
      SystemParametersInfo(SPI_SETPOWEROFFTIMEOUT, (int) Param, NULL, SPIF_UPDATEINIFILE); 
   } 
} 
//---------------------------------------------------------------------------

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AnsiString GetTitleBarFontName() 
{ 
   NONCLIENTMETRICS metrics; 
   metrics.cbSize = sizeof(metrics); 
   AnsiString result = "Aucune Font trouvée"; 
   if (SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(metrics), &metrics, 0)) 
   { 
      result = metrics.lfCaptionFont.lfFaceName; 
   } 
   return result; 
}

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int GetSystemFontSize() 
{ 
   HDC dc = GetDC(0); 
   int result = GetDeviceCaps(dc, LOGPIXELSX); 
   ReleaseDC(0, dc); 
   return result; 
}