//////////////////
//获得系统版本号
/////////////////
const
  VER_NT_WORKSTATION                 = $00000001;
  VER_NT_DOMAIN_CONTROLLER           = $00000002;
  VER_NT_SERVER                      = $00000003;

  VER_SERVER_NT                      = $80000000;
  VER_WORKSTATION_NT                 = $40000000;

  VER_SUITE_SMALLBUSINESS            = $00000001;
  VER_SUITE_ENTERPRISE               = $00000002;
  VER_SUITE_BACKOFFICE               = $00000004;
  VER_SUITE_COMMUNICATIONS           = $00000008;
  VER_SUITE_TERMINAL                 = $00000010;
  VER_SUITE_SMALLBUSINESS_RESTRICTED = $00000020;
  VER_SUITE_DATACENTER               = $00000080;
  VER_SUITE_SINGLEUSERTS             = $00000100;
  VER_SUITE_PERSONAL                 = $00000200;
  VER_SUITE_BLADE                    = $00000400;

type
  POSVersionInfoEx = ^TOSVersionInfoEx;
  OSVERSIONINFOEXA = record
    dwOSVersionInfoSize: DWORD;
    dwMajorVersion: DWORD;
    dwMinorVersion: DWORD;
    dwBuildNumber: DWORD;
    dwPlatformId: DWORD;
    szCSDVersion: Array[0..127] of AnsiChar;
    wServicePackMajor: WORD;
    wServicePackMinor: WORD;
    wSuiteMask: WORD;
    wProductType: BYTE;
    wReserved: BYTE;
  end;
  OSVERSIONINFOEXW = record
    dwOSVersionInfoSize: DWORD;
    dwMajorVersion: DWORD;
    dwMinorVersion: DWORD;
    dwBuildNumber: DWORD;
    dwPlatformId: DWORD;
    szCSDVersion: Array[0..127] of WideChar;
    wServicePackMajor: WORD;
    wServicePackMinor: WORD;
    wSuiteMask: WORD;
    wProductType: BYTE;
    wReserved: BYTE;
  end;
  OSVERSIONINFOEX = OSVERSIONINFOEXA;
  TOSVersionInfoEx = OSVERSIONINFOEX;

function GetWindowsVersion: String;   //取系统版本号（字符串形式）
var
  osVerInfo : TOSVersionInfoEx;
  ExVerExist: Boolean;
  ProductType: String;
Begin
  Result:='Microsoft Windows';
  ExVerExist:=True;
  osVerInfo.dwOSVersionInfoSize:=SizeOf(TOSVersionInfoEx);
  if not GetVersionEx(POSVersionInfo(@osVerInfo)^) then
  begin
    osVerInfo.dwOSVersionInfoSize:=SizeOf(TOSVersionInfo);
    GetVersionEx(POSVersionInfo(@osVerInfo)^);
    ExVerExist:=False;
  end;
  with osVerInfo do
  begin
    case dwPlatformId of
      VER_PLATFORM_WIN32s : Result:=Result+Format(' %d.%d',[dwMajorVersion,dwMinorVersion]);
      VER_PLATFORM_WIN32_WINDOWS : { Windows 9x/ME }
        begin
          if (dwMajorVersion=4) and (dwMinorVersion=0) then
          begin
            Result:=Result+' 95';
            if szCSDVersion[1] in ['B','C'] then
              Result:=Result+' OSR2';
          end
          else if (dwMajorVersion=4) and (dwMinorVersion=10) then
          begin
            Result:=Result+' 98';
            if (osVerInfo.szCSDVersion[1]='A') then
              Result:=Result+' Second Edition';
          end
          else if (dwMajorVersion=4) and (dwMinorVersion=90) Then
            Result:=Result+' Millenium Edition';
        end;
      VER_PLATFORM_WIN32_NT : { Windows NT/2000 }
        begin
          case dwMajorVersion of
            3,4: Result:=Result+Format(' NT %d.%d',[dwMajorVersion,dwMinorVersion]);
            5: begin
                 if dwMinorVersion=0 then
                   Result:=Result+' 2000'
                 else if dwMinorVersion=1 then
                   Result:=Result+' XP'
                 else if dwMinorVersion=2 then
                   Result:=Result+' 2003 Server';
               end;
          end;

          if ExVerExist then
          begin
            if wProductType=VER_NT_WORKSTATION then
            begin
              if dwMajorVersion=4 then
                Result:=Result+' Workstation'
              else if wSuiteMask and VER_SUITE_PERSONAL <> 0 then
                Result:=Result+' Home Edition'
              else
                Result:=Result+' Professional';
            end
            else if wProductType=VER_NT_SERVER then
            begin
              if (dwMajorVersion=5) and (dwMinorVersion=2) then
              begin
                if wSuiteMask and VER_SUITE_DATACENTER <> 0 then
                  Result:=Result+' Datacenter Edition'
                else if wSuiteMask and VER_SUITE_ENTERPRISE <> 0 then
                  Result:=Result+' Enterprise Edition'
                else if wSuiteMask and VER_SUITE_BLADE <> 0 then
                  Result:=Result+' Web Edition'
                else
                  Result:=Result+' Standard Edition';
              end
              else if (dwMajorVersion=5) and (dwMinorVersion=0) then
              begin
                if wSuiteMask and VER_SUITE_DATACENTER <> 0 then
                  Result:=Result+' Datacenter Server'
                else if wSuiteMask and VER_SUITE_ENTERPRISE <> 0 then
                  Result:=Result+' Advanced Server'
                else
                  Result:=Result+' Server'
              end
              else
              begin
                Result:=Result+' Server';
                if wSuiteMask and VER_SUITE_ENTERPRISE <> 0 then
                  Result:=Result+' Enterprise Edition';
              end;
            end;
          end
          else
          begin
            with TRegistry.Create do
            begin
              try
                RootKey:=HKEY_LOCAL_MACHINE;
                if OpenKey('\SYSTEM\CurrentControlSet\Control\ProductOptions',False) then
                begin
                  if ValueExists('ProductType') then
                  begin
                    ProductType:=ReadString('ProductType');
                    if SameText(ProductType,'WinNT') then
                      Result:=Result+' Workstation'
                    else if SameText(ProductType,'LanManNT') then
                      Result:=Result+' Server'
                    else if SameText(ProductType,'ServerNT') then
                      Result:=Result+' Advance Server';
                  end;
                  CloseKey;
                end;
              finally
                Free;
              end;
            end;
          end;

          Result:=Result+' '+szCSDVersion;
          if (dwMajorVersion=4) and SameText(szCSDVersion,'Service Pack 6') then
          begin
            with TRegistry.Create do
            begin
              try
                RootKey:=HKEY_LOCAL_MACHINE;
                if OpenKey('\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Hotfix\Q246009',False) then
                begin
                  Result:=Result+'a';
                  CloseKey;
                end;
              finally
                Free;
              end;
            end;
          end;

          Result:=Result+Format(' (Build %d)',[dwBuildNumber and $FFFF]);
        end;
    end;
  end
end;
////////////////////////

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