[C++|Windows 8]Get Accent & Background Color from Desktop Application

Windows 8 has some great features. Specially in the Metro design with some nice colors. This code will show how to get current used(selected) color in your start screen(personalization)

#include <windows.h>
#include <iostream>
 
typedef struct PersonalizationColor {
 int r;
 int g;
 int b;
} PersonalizationColor;
 
static const unsigned char ColorSet_Version3[25][2][3] = {    // Table for Accent & Background color in Windows 8
 {{37,37,37},{244,179,0}},
 {{37,37,37},{120,186,0}},
 {{37,37,37},{38,115,236}},
 {{37,37,37},{174,17,61}},
 {{46,23,0},{99,47,0}},
 {{78,0,0},{176,30,0}},
 {{78,0,56},{193,0,79}},
 {{45,0,78},{114,0,172}},
 {{31,0,104},{70,23,180}},
 {{0,30,78},{0,106,193}},
 {{0,77,96},{0,130,135}},
 {{0,74,0},{25,153,0}},
 {{21,153,42},{0,193,63}},
 {{229,108,25},{255,152,29}},
 {{184,27,27},{255,46,18}},
 {{184,27,108},{255,29,119}},
 {{105,27,184},{170,64,255}},
 {{27,88,184},{31,174,255}},
 {{86,156,227},{86,197,255}},
 {{0,170,170},{0,216,204}},
 {{131,186,31},{145,209,0}},
 {{211,157,9},{225,183,0}},
 {{224,100,183},{255,118,188}},
 {{105,105,105},{0,164,164}},
 {{105,105,105},{255,125,35}}
};
 
typedef struct windows_version {
 int major;    // CurrentVersion
 int minor;    // CurrentVersion
 int build_number;  // CurrentBuildNumber
 char name[256];   // ProductName
 char service_pack[256]; // CSDVersion(if exist)
 char edition[128];  // EditionID(if exist)
} windows_version;
 
int get_winver(windows_version* ptr) {
 HKEY temp;
 unsigned char CurrentVersion[8];
 long long long_temp=8;
 if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows NT\\CurrentVersion",0,KEY_READ,&temp)==ERROR_SUCCESS) {
  int a=0;
  if(RegQueryValueEx(temp,"CurrentVersion",0,nullptr,CurrentVersion,(LPDWORD)&long_temp)!=ERROR_SUCCESS)
   return 0;
  double current_version=strtod((char*)CurrentVersion,nullptr);
  ptr->major=(int)floor(current_version);
  ptr->minor=(int)floor(current_version*10.0)-ptr->major*10;
  long_temp=8;
  memset(CurrentVersion,0,8);
  if((a=RegQueryValueEx(temp,"CurrentBuildNumber",0,nullptr,CurrentVersion,(LPDWORD)&long_temp))!=ERROR_SUCCESS)
   return 0;
  ptr->build_number=atoi((char*)CurrentVersion);
  long_temp=256;
  if(RegQueryValueEx(temp,"ProductName",0,nullptr,(LPBYTE)ptr->name,(LPDWORD)&long_temp)!=ERROR_SUCCESS)
   return 0;
  int* from_lt=(int*)&long_temp+4;
  long_temp=256;
  *from_lt=RegQueryValueEx(temp,"CSDVersion",0,nullptr,(LPBYTE)ptr->service_pack,(LPDWORD)&long_temp);
  if(*from_lt==ERROR_FILE_NOT_FOUND)
   memset(ptr->service_pack,0,256);
  else if(*from_lt!=ERROR_SUCCESS)
   return 0;
  long_temp=128;
  *from_lt=RegQueryValueEx(temp,"EditionID",0,nullptr,(LPBYTE)ptr->edition,(LPDWORD)&long_temp);
  if(*from_lt==ERROR_FILE_NOT_FOUND)
   memset(ptr->edition,0,128);
  else if(*from_lt!=ERROR_SUCCESS)
   return 0;
 } else
  return 0;
 RegCloseKey(temp);
 return 1;
}
 
bool Win8GetAccentColor(PersonalizationColor* col) {
 windows_version win;
 get_winver(&win);
 if(win.major>=6 && (win.minor>=2 && win.minor<=3)) {
  HKEY temp;
  int r=0;
  if((r=RegOpenKeyExA(HKEY_CURRENT_USER,"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Accent",0,KEY_READ,&temp))==ERROR_SUCCESS) {
   auto accent_color=0UL;
   auto buf=4UL;
   if(win.minor==2) {
    if((r=RegQueryValueExA(temp,"ColorSet_Version3",nullptr,nullptr,(LPBYTE)&accent_color,&buf))==ERROR_SUCCESS) {
     col->r=ColorSet_Version3[accent_color][1][0];
     col->g=ColorSet_Version3[accent_color][1][1];
     col->b=ColorSet_Version3[accent_color][1][2];
     RegCloseKey(temp);
     return true;
    } else {
     RegCloseKey(temp);
     return false;
    }
   } else {
    if((r=RegQueryValueExA(temp,"AccentColor",nullptr,nullptr,(LPBYTE)&accent_color,&buf))==ERROR_SUCCESS) {
     col->r=GetRValue(accent_color);
     col->g=GetGValue(accent_color);
     col->b=GetBValue(accent_color);
     RegCloseKey(temp);
     return true;
    } else {
     RegCloseKey(temp);
     return false;
    }
   }
  } else
   return false;
 } else
  return false;
}
 
bool Win8GetBackgroundColor(PersonalizationColor* col) {
 windows_version win;
 get_winver(&win);
 if(win.major>=6 && (win.minor>=2 && win.minor<=3)) {
  HKEY temp;
  int r=0;
  if((r=RegOpenKeyExA(HKEY_CURRENT_USER,"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Accent",0,KEY_READ,&temp))==ERROR_SUCCESS) {
   auto accent_color=0UL;
   auto buf=4UL;
   if(win.minor==2) {
    if((r=RegQueryValueExA(temp,"ColorSet_Version3",nullptr,nullptr,(LPBYTE)&accent_color,&buf))==ERROR_SUCCESS) {
     col->r=ColorSet_Version3[accent_color][0][0];
     col->g=ColorSet_Version3[accent_color][0][1];
     col->b=ColorSet_Version3[accent_color][0][2];
     RegCloseKey(temp);
     return 3;
    } else {
     RegCloseKey(temp);
     return true;
    }
   } else {
    if((r=RegQueryValueExA(temp,"StartColor",nullptr,nullptr,(LPBYTE)&accent_color,&buf))==ERROR_SUCCESS) {
     col->r=GetRValue(accent_color);
     col->g=GetGValue(accent_color);
     col->b=GetBValue(accent_color);
     RegCloseKey(temp);
     return true;
    } else {
     RegCloseKey(temp);
     return false;
    }
   }
  } else {
   return false;
  }
 } else
  return false;
}
 
int main() {
 PersonalizationColor accent;
 PersonalizationColor background;
 if(!Win8GetAccentColor(&accent)) {
  std::cerr << "Cannot get accent color!" << endl;
  return 1;
 }
 if(!Win8GetBackgroundColor(&background)) {
  std::cerr << "Cannot get background color!" << endl;
  return 1;
 }
 std::cout << "Accent: " << accent.r << "," << accent.g << "," << accent.g << endl << "Background: " << background.r << "," << background.g << "," << background.b << endl;
 return 0;
}

Note1: It also work in Windows 8.1 without any edits
Note2: It can be ported to C with some editing.
Note3: I give a bonus code. You can use get_winver to get windows version(which i think is better than GetVersionEx)