从注册表中得到目前操作系统是Windows95还是WindowsNT，并得到其版本，首先要在USES段加入下面的内容
uses Registry, ComCtrls, ExtCtrls;
然后才在需要的地方加入下面语句var
MyVersionInfo: TOSVersionInfo;
MyReg: TRegistry;
IsNT: Boolean;
begin
MyReg := TRegistry.Create;
MyReg.RootKey := HKEY_LOCAL_MACHINE;

IsNT := False;

MyVersionInfo.dwOSVersionInfoSize := sizeof(TOSVERSIONINFO);

if GetVersionEx(MyVersionInfo) then
Label1.Caption := IntToStr(MyVersionInfo.dwPlatformId)
else Label1.Caption := 'false';

if MyVersionInfo.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS then
Label1.Caption := 'Windows 95';
if MyVersionInfo.dwPlatformId = VER_PLATFORM_WIN32_NT then
begin
IsNT := True;
Label1.Caption := 'Windows NT';
end;

try
if IsNT then
if not MyReg.OpenKey('\SOFTWARE\Microsoft\Windows NT\CurrentVersion', FALSE) then
else Label2.Caption := MyReg.ReadString('CurrentVersion')
else
if not MyReg.OpenKey('\SOFTWARE\Microsoft\Windows\CurrentVersion', FALSE) then
else Label2.Caption := MyReg.ReadString('VersionNumber');
finally
end; // try..finally
end;

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