Delphi中判断是否是64位操作系统

时间：2011/9/3 15:18:02 点击：

　　核心提示：需要注意是GetNativeSystemInfo 函数从WindowsXP开始才有，而 IsWow64Process 函数从 WindowsXP with SP2 以及 Windows Server...

需要注意是GetNativeSystemInfo 函数从Windows XP 开始才有，而 IsWow64Process 函数从 Windows XP with SP2 以及 Windows Server 2003 with SP1 开始才有。所以使用该函数的时候最好用GetProcAddress 。

function IsWin64: Boolean;
var
Kernel32Handle: THandle;
IsWow64Process: function(Handle: Windows.THandle; var Res: Windows.BOOL): Windows.BOOL; stdcall;
GetNativeSystemInfo: procedure(var lpSystemInfo: TSystemInfo); stdcall;
isWoW64: Bool;
SystemInfo: TSystemInfo;
const
PROCESSOR_ARCHITECTURE_AMD64 = 9;
PROCESSOR_ARCHITECTURE_IA64 = 6;
begin
Kernel32Handle := GetModuleHandle('KERNEL32.DLL');
if Kernel32Handle = 0 then
    Kernel32Handle := LoadLibrary('KERNEL32.DLL');
if Kernel32Handle <> 0 then
begin
    IsWOW64Process := GetProcAddress(Kernel32Handle,'IsWow64Process');
    GetNativeSystemInfo := GetProcAddress(Kernel32Handle,'GetNativeSystemInfo');
    if Assigned(IsWow64Process) then
    begin
      IsWow64Process(GetCurrentProcess,isWoW64);
      Result := isWoW64 and Assigned(GetNativeSystemInfo);
      if Result then
      begin
        GetNativeSystemInfo(SystemInfo);
        Result := (SystemInfo.wProcessorArchitecture = PROCESSOR_ARCHITECTURE_AMD64) or
                  (SystemInfo.wProcessorArchitecture = PROCESSOR_ARCHITECTURE_IA64);
      end;
    end
    else Result := False;
end
else Result := False;
end;