CryptAcquireContext和CryptDeriveKey x64模式

德尔福Xe4 . 在Win7Pro x64，Win8Ent x64，WinSrv2012上进行测试;

Const

CGuAdvapi32dll=WinApi.Windows.Advapi32;

CALG_MD2      = 32769;
CALG_MD4      = 32770;
CALG_MD5      = 32771;
CALG_SHA      = 32772;
CALG_SHA_1    = 32772; // CALG_SHA
CALG_SHA_256  = 32780;
CALG_SHA_384  = 32781;
CALG_SHA_512  = 32782;

CALG_DES      = 26113;
CALG_RC2      = 26114;
CALG_3DES     = 26115;
CALG_3DES_112 = 26121;
CALG_AES_128  = 26126;
CALG_AES_192  = 26127;
CALG_AES_256  = 26128;
CALG_AES      = 26128; // CALG_AES_256
CALG_RC4      = 26625;

PROV_RSA_AES = 24;        // The PROV_SSL provider type supports US AES crypto-algorithm
CRYPT_VERIFYCONTEXT = $F0000000;


{S} Function GuCryptAcquireContext(hProv: PULong; Container: LPCTSTR; Provider: LPCTSTR; ProvType: DWord; Flags: DWord): Bool; StdCall; External CGuAdvapi32dll Name 'CryptAcquireContextW';
{S} Function GuCryptReleaseContext(hProv: ULong; Flags: DWord): Bool; StdCall; External CGuAdvapi32dll Name 'CryptReleaseContext';
{S} Function GuCryptCreateHash(hProv: ULong; AlgId: ULong; hKey: ULong; Flags: DWord; Hash: PULong): Bool; StdCall; External CGuAdvapi32dll Name 'CryptCreateHash';
{S} Function GuCryptHashData(hHash: ULong; Data: PByte; DataLen: DWord; Flags: DWord): Bool; StdCall; External CGuAdvapi32dll Name 'CryptHashData';
{S} Function GuCryptDeriveKey(hProv: ULong; AlgId: ULong; hData: ULong; Flags: DWord; Key: PULong): Bool; StdCall; External CGuAdvapi32dll Name 'CryptDeriveKey';
{S} Function GuCryptDestroyHash(hHash: ULong): Bool; StdCall; External CGuAdvapi32dll Name 'CryptDestroyHash';
{S} Function GuCryptDestroyKey(hKey: ULong): Bool; StdCall; External CGuAdvapi32dll Name 'CryptDestroyKey';

...

Procedure Test64;
var   hProv, hKey, hHash: Ulong; key:string; CGuSoC:dword;
begin
  key:='my test password';CGuSoC:=sizeof(char);
  if not GuCryptAcquireContext(@hProv, nil, nil, PROV_RSA_AES, CRYPT_VERIFYCONTEXT) then MessageBox(0, 'Not CAC', 0, 0);
   MessageBox(0, PChar(IntToStr(hprov)), 0, 0); // < --- 1 check !
  if not GuCryptCreateHash(hProv, CALG_MD2{MD5, SHA}, 0, 0, @hHash) then MessageBox(0, 'Not CCH', 0, 0);
  if not GuCryptHashData(hHash, @key[1], Length(key)*CGuSoC, 0) then MessageBox(0, 'Not CHD', 0, 0);
  if not GuCryptDeriveKey(hProv, CALG_RC4{RC2, AES}, hHash, 0, @hKey) then MessageBox(0, 'Not CDK', 0, 0);
  if not GuCryptDestroyHash(hHash) then MessageBox(0, 'Not CDH', 0, 0);
   MessageBox(0, PChar(IntToStr(hprov)), 0, 0); // < --- 2 check !
  if not GuCryptDestroyKey(hKey) then MessageBox(0, 'Not CDK', 0, 0);
  if hProv=0 then MessageBox(0, 'hProv=0!', 0, 0) else if not GuCryptReleaseContext(hProv, 0) then MessageBox(0, 'Not CRC', 0, 0);
end;

问：用目标平台编译“32位窗口”，一切都好 . 在检查字符串1和2中显示大数字ID，例如 . 882345 .

编译目标平台"64-bit windows"，工作正常，但在检查2中显示"0"（检查1 =确定，大数） . Why?

附：我将hProv变量类型更改为ULong64（在proc.Test64 var . 和GuCryptAcquireContext定义中），但没有结果 .

对不起英语不好 .