Определение установленных версий .NET Framework в системе
Определение установленных версий .NET Framework в системе
/// <summary>
/// Enumerates all installed Common Language Runtime Engines.
/// </summary>
/// <param name="Index">Zero-based index of looked runtime
record.</param>
/// <returns>True if runtime with specified index found.</returns>
function EnumInstalledRuntimes(Index: Integer; out VersionName: String):
Boolean;
var
hkey: Windows.HKEY;
hsubkey: Windows.HKEY;
I: Cardinal;
J: Cardinal;
NameBuf: array[0..MAX_PATH] of Char;
CNameBuf: Cardinal;
lwt: TFileTime;
vt: DWORD;
AnyFound: Boolean;
begin
Result := False;
VersionName := '';
if ERROR_SUCCESS = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
PChar('SOFTWARE\Microsoft\.NETFramework\policy'), 0,
KEY_ENUMERATE_SUB_KEYS, hkey) then
try
I := 0;
while True do
begin
AnyFound := False;
CNameBuf := MAX_PATH + 1;
if ERROR_SUCCESS <> RegEnumKeyEx(hkey, I, @NameBuf[0], CNameBuf,nil, nil, nil, @lwt) then
begin
Break;
end;
if (NameBuf[0] = 'v') and (NameBuf[1] in ['1'..'9']) then
begin
VersionName := String(NameBuf);
if ERROR_SUCCESS = RegOpenKeyEx(hkey, @NameBuf[0], 0,KEY_QUERY_VALUE, hsubkey) then
try
J := 0;
while true do
begin
CNameBuf := MAX_PATH + 1;
if ERROR_SUCCESS <> RegEnumValue(hsubkey, J, @NameBuf[0],CNameBuf, nil, @vt, nil, nil) then
begin
Break;
end;
if (vt = REG_SZ) and (NameBuf[0] <> #0) then
begin
VersionName := VersionName + '.' + String(NameBuf);
AnyFound := True;
Break;
end;
Inc(J);
end;
finally
RegCloseKey(hsubkey);
end;
end;
Inc(I);
if AnyFound then
begin
if Index = 0 then
begin
Result := True;
Break;
end;
Dec(Index);
end;
end;
finally
RegCloseKey(hkey);
end;
end;
Автор Акжан Абдулин
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